21149440

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:106

約数の個数: 144

約数和(自身を含む): 57689856

約数和(自身を除く): 36540416

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, 520, 533, 620, 640, 656, 806, 820, 832, 992, 1040, 1066, 1240, 1271, 1280, 1312, 1612, 1640, 1664, 1984, 2015, 2080, 2132, 2480, 2542, 2624, 2665, 3224, 3280, 3328, 3968, 4030, 4160, 4264, 4960, 5084, 5248, 5330, 6355, 6448, 6560, 7936, 8060, 8320, 8528, 9920, 10168, 10496, 10660, 12710, 12896, 13120, 16120, 16523, 16640, 17056, 19840, 20336, 21320, 25420, 25792, 26240, 32240, 33046, 34112, 39680, 40672, 42640, 50840, 51584, 52480, 64480, 66092, 68224, 81344, 82615, 85280, 101680, 103168, 128960, 132184, 136448, 162688, 165230, 170560, 203360, 257920, 264368, 325376, 330460, 341120, 406720, 515840, 528736, 660920, 682240, 813440, 1057472, 1321840, 1626880, 2114944, 2643680, 4229888, 5287360, 10574720, 21149440]

約数ペア:

[(1, 21149440), (2, 10574720), (4, 5287360), (5, 4229888), (8, 2643680), (10, 2114944), (13, 1626880), (16, 1321840), (20, 1057472), (26, 813440), (31, 682240), (32, 660920), (40, 528736), (41, 515840), (52, 406720), (62, 341120), (64, 330460), (65, 325376), (80, 264368), (82, 257920), (104, 203360), (124, 170560), (128, 165230), (130, 162688), (155, 136448), (160, 132184), (164, 128960), (205, 103168), (208, 101680), (248, 85280), (256, 82615), (260, 81344), (310, 68224), (320, 66092), (328, 64480), (403, 52480), (410, 51584), (416, 50840), (496, 42640), (520, 40672), (533, 39680), (620, 34112), (640, 33046), (656, 32240), (806, 26240), (820, 25792), (832, 25420), (992, 21320), (1040, 20336), (1066, 19840), (1240, 17056), (1271, 16640), (1280, 16523), (1312, 16120), (1612, 13120), (1640, 12896), (1664, 12710), (1984, 10660), (2015, 10496), (2080, 10168), (2132, 9920), (2480, 8528), (2542, 8320), (2624, 8060), (2665, 7936), (3224, 6560), (3280, 6448), (3328, 6355), (3968, 5330), (4030, 5248), (4160, 5084), (4264, 4960)]