21238205

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{211}}^1\times {\mathrm{491}}^1$

素因数の和:748

約数の個数: 16

約数和(自身を含む): 26284608

約数和(自身を除く): 5046403

約数列:

[1, 5, 41, 205, 211, 491, 1055, 2455, 8651, 20131, 43255, 100655, 103601, 518005, 4247641, 21238205]

約数ペア:

[(1, 21238205), (5, 4247641), (41, 518005), (205, 103601), (211, 100655), (491, 43255), (1055, 20131), (2455, 8651)]