31657960

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{109}}^1\times {\mathrm{137}}^1$

素因数の和:310

約数の個数: 64

約数和(自身を含む): 73774800

約数和(自身を除く): 42116840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 109, 137, 212, 218, 265, 274, 424, 436, 530, 545, 548, 685, 872, 1060, 1090, 1096, 1370, 2120, 2180, 2740, 4360, 5480, 5777, 7261, 11554, 14522, 14933, 23108, 28885, 29044, 29866, 36305, 46216, 57770, 58088, 59732, 72610, 74665, 115540, 119464, 145220, 149330, 231080, 290440, 298660, 597320, 791449, 1582898, 3165796, 3957245, 6331592, 7914490, 15828980, 31657960]

約数ペア:

[(1, 31657960), (2, 15828980), (4, 7914490), (5, 6331592), (8, 3957245), (10, 3165796), (20, 1582898), (40, 791449), (53, 597320), (106, 298660), (109, 290440), (137, 231080), (212, 149330), (218, 145220), (265, 119464), (274, 115540), (424, 74665), (436, 72610), (530, 59732), (545, 58088), (548, 57770), (685, 46216), (872, 36305), (1060, 29866), (1090, 29044), (1096, 28885), (1370, 23108), (2120, 14933), (2180, 14522), (2740, 11554), (4360, 7261), (5480, 5777)]