20052040

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{157}}^1$

素因数の和:302

約数の個数: 64

約数和(自身を含む): 47324160

約数和(自身を除く): 27272120

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 103, 124, 155, 157, 206, 248, 310, 314, 412, 515, 620, 628, 785, 824, 1030, 1240, 1256, 1570, 2060, 3140, 3193, 4120, 4867, 6280, 6386, 9734, 12772, 15965, 16171, 19468, 24335, 25544, 31930, 32342, 38936, 48670, 63860, 64684, 80855, 97340, 127720, 129368, 161710, 194680, 323420, 501301, 646840, 1002602, 2005204, 2506505, 4010408, 5013010, 10026020, 20052040]

約数ペア:

[(1, 20052040), (2, 10026020), (4, 5013010), (5, 4010408), (8, 2506505), (10, 2005204), (20, 1002602), (31, 646840), (40, 501301), (62, 323420), (103, 194680), (124, 161710), (155, 129368), (157, 127720), (206, 97340), (248, 80855), (310, 64684), (314, 63860), (412, 48670), (515, 38936), (620, 32342), (628, 31930), (785, 25544), (824, 24335), (1030, 19468), (1240, 16171), (1256, 15965), (1570, 12772), (2060, 9734), (3140, 6386), (3193, 6280), (4120, 4867)]