20578540

素因数分解:

$2^2\times 5^1\times {\mathrm{797}}^1\times {\mathrm{1291}}^1$

素因数の和:2097

約数の個数: 24

約数和(自身を含む): 43302672

約数和(自身を除く): 22724132

約数列:

[1, 2, 4, 5, 10, 20, 797, 1291, 1594, 2582, 3188, 3985, 5164, 6455, 7970, 12910, 15940, 25820, 1028927, 2057854, 4115708, 5144635, 10289270, 20578540]

約数ペア:

[(1, 20578540), (2, 10289270), (4, 5144635), (5, 4115708), (10, 2057854), (20, 1028927), (797, 25820), (1291, 15940), (1594, 12910), (2582, 7970), (3188, 6455), (3985, 5164)]