21170665

素因数分解:

$5^1\times {\mathrm{149}}^1\times {\mathrm{157}}^1\times {\mathrm{181}}^1$

素因数の和:492

約数の個数: 16

約数和(自身を含む): 25880400

約数和(自身を除く): 4709735

約数列:

[1, 5, 149, 157, 181, 745, 785, 905, 23393, 26969, 28417, 116965, 134845, 142085, 4234133, 21170665]

約数ペア:

[(1, 21170665), (5, 4234133), (149, 142085), (157, 134845), (181, 116965), (745, 28417), (785, 26969), (905, 23393)]