31680680

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{163}}^1$

素因数の和:330

約数の個数: 64

約数和(自身を含む): 74036160

約数和(自身を除く): 42355480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 113, 163, 172, 215, 226, 326, 344, 430, 452, 565, 652, 815, 860, 904, 1130, 1304, 1630, 1720, 2260, 3260, 4520, 4859, 6520, 7009, 9718, 14018, 18419, 19436, 24295, 28036, 35045, 36838, 38872, 48590, 56072, 70090, 73676, 92095, 97180, 140180, 147352, 184190, 194360, 280360, 368380, 736760, 792017, 1584034, 3168068, 3960085, 6336136, 7920170, 15840340, 31680680]

約数ペア:

[(1, 31680680), (2, 15840340), (4, 7920170), (5, 6336136), (8, 3960085), (10, 3168068), (20, 1584034), (40, 792017), (43, 736760), (86, 368380), (113, 280360), (163, 194360), (172, 184190), (215, 147352), (226, 140180), (326, 97180), (344, 92095), (430, 73676), (452, 70090), (565, 56072), (652, 48590), (815, 38872), (860, 36838), (904, 35045), (1130, 28036), (1304, 24295), (1630, 19436), (1720, 18419), (2260, 14018), (3260, 9718), (4520, 7009), (4859, 6520)]