20847640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47381}}^1$

素因数の和:47403

約数の個数: 32

約数和(自身を含む): 51172560

約数和(自身を除く): 30324920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47381, 94762, 189524, 236905, 379048, 473810, 521191, 947620, 1042382, 1895240, 2084764, 2605955, 4169528, 5211910, 10423820, 20847640]

約数ペア:

[(1, 20847640), (2, 10423820), (4, 5211910), (5, 4169528), (8, 2605955), (10, 2084764), (11, 1895240), (20, 1042382), (22, 947620), (40, 521191), (44, 473810), (55, 379048), (88, 236905), (110, 189524), (220, 94762), (440, 47381)]