21781108

素因数分解:

$2^2\times {\mathrm{131}}^1\times {\mathrm{197}}^1\times {\mathrm{211}}^1$

素因数の和:543

約数の個数: 24

約数和(自身を含む): 38785824

約数和(自身を除く): 17004716

約数列:

[1, 2, 4, 131, 197, 211, 262, 394, 422, 524, 788, 844, 25807, 27641, 41567, 51614, 55282, 83134, 103228, 110564, 166268, 5445277, 10890554, 21781108]

約数ペア:

[(1, 21781108), (2, 10890554), (4, 5445277), (131, 166268), (197, 110564), (211, 103228), (262, 83134), (394, 55282), (422, 51614), (524, 41567), (788, 27641), (844, 25807)]