20317880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{757}}^1$

素因数の和:840

約数の個数: 64

約数和(自身を含む): 50755680

約数和(自身を除く): 30437800

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 61, 88, 110, 122, 220, 244, 305, 440, 488, 610, 671, 757, 1220, 1342, 1514, 2440, 2684, 3028, 3355, 3785, 5368, 6056, 6710, 7570, 8327, 13420, 15140, 16654, 26840, 30280, 33308, 41635, 46177, 66616, 83270, 92354, 166540, 184708, 230885, 333080, 369416, 461770, 507947, 923540, 1015894, 1847080, 2031788, 2539735, 4063576, 5079470, 10158940, 20317880]

約数ペア:

[(1, 20317880), (2, 10158940), (4, 5079470), (5, 4063576), (8, 2539735), (10, 2031788), (11, 1847080), (20, 1015894), (22, 923540), (40, 507947), (44, 461770), (55, 369416), (61, 333080), (88, 230885), (110, 184708), (122, 166540), (220, 92354), (244, 83270), (305, 66616), (440, 46177), (488, 41635), (610, 33308), (671, 30280), (757, 26840), (1220, 16654), (1342, 15140), (1514, 13420), (2440, 8327), (2684, 7570), (3028, 6710), (3355, 6056), (3785, 5368)]