20527520

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:238

約数の個数: 96

約数和(自身を含む): 53343360

約数和(自身を除く): 32815840

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 71, 80, 104, 130, 139, 142, 160, 208, 260, 278, 284, 355, 416, 520, 556, 568, 695, 710, 923, 1040, 1112, 1136, 1390, 1420, 1807, 1846, 2080, 2224, 2272, 2780, 2840, 3614, 3692, 4448, 4615, 5560, 5680, 7228, 7384, 9035, 9230, 9869, 11120, 11360, 14456, 14768, 18070, 18460, 19738, 22240, 28912, 29536, 36140, 36920, 39476, 49345, 57824, 72280, 73840, 78952, 98690, 128297, 144560, 147680, 157904, 197380, 256594, 289120, 315808, 394760, 513188, 641485, 789520, 1026376, 1282970, 1579040, 2052752, 2565940, 4105504, 5131880, 10263760, 20527520]

約数ペア:

[(1, 20527520), (2, 10263760), (4, 5131880), (5, 4105504), (8, 2565940), (10, 2052752), (13, 1579040), (16, 1282970), (20, 1026376), (26, 789520), (32, 641485), (40, 513188), (52, 394760), (65, 315808), (71, 289120), (80, 256594), (104, 197380), (130, 157904), (139, 147680), (142, 144560), (160, 128297), (208, 98690), (260, 78952), (278, 73840), (284, 72280), (355, 57824), (416, 49345), (520, 39476), (556, 36920), (568, 36140), (695, 29536), (710, 28912), (923, 22240), (1040, 19738), (1112, 18460), (1136, 18070), (1390, 14768), (1420, 14456), (1807, 11360), (1846, 11120), (2080, 9869), (2224, 9230), (2272, 9035), (2780, 7384), (2840, 7228), (3614, 5680), (3692, 5560), (4448, 4615)]