81954080

素因数分解:

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

素因数の和:131

約数の個数: 144

約数和(自身を含む): 220708152

約数和(自身を除く): 138754072

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 41, 52, 62, 65, 80, 82, 104, 124, 130, 155, 160, 164, 205, 208, 248, 260, 310, 328, 403, 410, 416, 496, 520, 533, 620, 656, 806, 820, 961, 992, 1040, 1066, 1240, 1271, 1312, 1612, 1640, 1922, 2015, 2080, 2132, 2480, 2542, 2665, 3224, 3280, 3844, 4030, 4264, 4805, 4960, 5084, 5330, 6355, 6448, 6560, 7688, 8060, 8528, 9610, 10168, 10660, 12493, 12710, 12896, 15376, 16120, 16523, 17056, 19220, 20336, 21320, 24986, 25420, 30752, 32240, 33046, 38440, 39401, 40672, 42640, 49972, 50840, 62465, 64480, 66092, 76880, 78802, 82615, 85280, 99944, 101680, 124930, 132184, 153760, 157604, 165230, 197005, 199888, 203360, 249860, 264368, 315208, 330460, 394010, 399776, 499720, 512213, 528736, 630416, 660920, 788020, 999440, 1024426, 1260832, 1321840, 1576040, 1998880, 2048852, 2561065, 2643680, 3152080, 4097704, 5122130, 6304160, 8195408, 10244260, 16390816, 20488520, 40977040, 81954080]

約数ペア:

[(1, 81954080), (2, 40977040), (4, 20488520), (5, 16390816), (8, 10244260), (10, 8195408), (13, 6304160), (16, 5122130), (20, 4097704), (26, 3152080), (31, 2643680), (32, 2561065), (40, 2048852), (41, 1998880), (52, 1576040), (62, 1321840), (65, 1260832), (80, 1024426), (82, 999440), (104, 788020), (124, 660920), (130, 630416), (155, 528736), (160, 512213), (164, 499720), (205, 399776), (208, 394010), (248, 330460), (260, 315208), (310, 264368), (328, 249860), (403, 203360), (410, 199888), (416, 197005), (496, 165230), (520, 157604), (533, 153760), (620, 132184), (656, 124930), (806, 101680), (820, 99944), (961, 85280), (992, 82615), (1040, 78802), (1066, 76880), (1240, 66092), (1271, 64480), (1312, 62465), (1612, 50840), (1640, 49972), (1922, 42640), (2015, 40672), (2080, 39401), (2132, 38440), (2480, 33046), (2542, 32240), (2665, 30752), (3224, 25420), (3280, 24986), (3844, 21320), (4030, 20336), (4264, 19220), (4805, 17056), (4960, 16523), (5084, 16120), (5330, 15376), (6355, 12896), (6448, 12710), (6560, 12493), (7688, 10660), (8060, 10168), (8528, 9610)]