81735640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{1163}}^1$

素因数の和:1432

約数の個数: 64

約数和(自身を含む): 211196160

約数和(自身を除く): 129460520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 251, 280, 502, 1004, 1163, 1255, 1757, 2008, 2326, 2510, 3514, 4652, 5020, 5815, 7028, 8141, 8785, 9304, 10040, 11630, 14056, 16282, 17570, 23260, 32564, 35140, 40705, 46520, 65128, 70280, 81410, 162820, 291913, 325640, 583826, 1167652, 1459565, 2043391, 2335304, 2919130, 4086782, 5838260, 8173564, 10216955, 11676520, 16347128, 20433910, 40867820, 81735640]

約数ペア:

[(1, 81735640), (2, 40867820), (4, 20433910), (5, 16347128), (7, 11676520), (8, 10216955), (10, 8173564), (14, 5838260), (20, 4086782), (28, 2919130), (35, 2335304), (40, 2043391), (56, 1459565), (70, 1167652), (140, 583826), (251, 325640), (280, 291913), (502, 162820), (1004, 81410), (1163, 70280), (1255, 65128), (1757, 46520), (2008, 40705), (2326, 35140), (2510, 32564), (3514, 23260), (4652, 17570), (5020, 16282), (5815, 14056), (7028, 11630), (8141, 10040), (8785, 9304)]