1311265280

素因数分解:

$2^9\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{41}}^1$

素因数の和:139

約数の個数: 240

約数和(自身を含む): 3583879992

約数和(自身を除く): 2272614712

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 41, 52, 62, 64, 65, 80, 82, 104, 124, 128, 130, 155, 160, 164, 205, 208, 248, 256, 260, 310, 320, 328, 403, 410, 416, 496, 512, 520, 533, 620, 640, 656, 806, 820, 832, 961, 992, 1040, 1066, 1240, 1271, 1280, 1312, 1612, 1640, 1664, 1922, 1984, 2015, 2080, 2132, 2480, 2542, 2560, 2624, 2665, 3224, 3280, 3328, 3844, 3968, 4030, 4160, 4264, 4805, 4960, 5084, 5248, 5330, 6355, 6448, 6560, 6656, 7688, 7936, 8060, 8320, 8528, 9610, 9920, 10168, 10496, 10660, 12493, 12710, 12896, 13120, 15376, 15872, 16120, 16523, 16640, 17056, 19220, 19840, 20336, 20992, 21320, 24986, 25420, 25792, 26240, 30752, 32240, 33046, 33280, 34112, 38440, 39401, 39680, 40672, 42640, 49972, 50840, 51584, 52480, 61504, 62465, 64480, 66092, 68224, 76880, 78802, 79360, 81344, 82615, 85280, 99944, 101680, 103168, 104960, 123008, 124930, 128960, 132184, 136448, 153760, 157604, 162688, 165230, 170560, 197005, 199888, 203360, 206336, 246016, 249860, 257920, 264368, 272896, 307520, 315208, 325376, 330460, 341120, 394010, 399776, 406720, 492032, 499720, 512213, 515840, 528736, 615040, 630416, 650752, 660920, 682240, 788020, 799552, 813440, 999440, 1024426, 1031680, 1057472, 1230080, 1260832, 1321840, 1364480, 1576040, 1599104, 1626880, 1998880, 2048852, 2114944, 2460160, 2521664, 2561065, 2643680, 3152080, 3198208, 3253760, 3997760, 4097704, 4229888, 5043328, 5122130, 5287360, 6304160, 6396416, 7995520, 8195408, 8459776, 10086656, 10244260, 10574720, 12608320, 15991040, 16390816, 20173312, 20488520, 21149440, 25216640, 31982080, 32781632, 40977040, 42298880, 50433280, 65563264, 81954080, 100866560, 131126528, 163908160, 262253056, 327816320, 655632640, 1311265280]

約数ペア:

[(1, 1311265280), (2, 655632640), (4, 327816320), (5, 262253056), (8, 163908160), (10, 131126528), (13, 100866560), (16, 81954080), (20, 65563264), (26, 50433280), (31, 42298880), (32, 40977040), (40, 32781632), (41, 31982080), (52, 25216640), (62, 21149440), (64, 20488520), (65, 20173312), (80, 16390816), (82, 15991040), (104, 12608320), (124, 10574720), (128, 10244260), (130, 10086656), (155, 8459776), (160, 8195408), (164, 7995520), (205, 6396416), (208, 6304160), (248, 5287360), (256, 5122130), (260, 5043328), (310, 4229888), (320, 4097704), (328, 3997760), (403, 3253760), (410, 3198208), (416, 3152080), (496, 2643680), (512, 2561065), (520, 2521664), (533, 2460160), (620, 2114944), (640, 2048852), (656, 1998880), (806, 1626880), (820, 1599104), (832, 1576040), (961, 1364480), (992, 1321840), (1040, 1260832), (1066, 1230080), (1240, 1057472), (1271, 1031680), (1280, 1024426), (1312, 999440), (1612, 813440), (1640, 799552), (1664, 788020), (1922, 682240), (1984, 660920), (2015, 650752), (2080, 630416), (2132, 615040), (2480, 528736), (2542, 515840), (2560, 512213), (2624, 499720), (2665, 492032), (3224, 406720), (3280, 399776), (3328, 394010), (3844, 341120), (3968, 330460), (4030, 325376), (4160, 315208), (4264, 307520), (4805, 272896), (4960, 264368), (5084, 257920), (5248, 249860), (5330, 246016), (6355, 206336), (6448, 203360), (6560, 199888), (6656, 197005), (7688, 170560), (7936, 165230), (8060, 162688), (8320, 157604), (8528, 153760), (9610, 136448), (9920, 132184), (10168, 128960), (10496, 124930), (10660, 123008), (12493, 104960), (12710, 103168), (12896, 101680), (13120, 99944), (15376, 85280), (15872, 82615), (16120, 81344), (16523, 79360), (16640, 78802), (17056, 76880), (19220, 68224), (19840, 66092), (20336, 64480), (20992, 62465), (21320, 61504), (24986, 52480), (25420, 51584), (25792, 50840), (26240, 49972), (30752, 42640), (32240, 40672), (33046, 39680), (33280, 39401), (34112, 38440)]