21257951

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{2437}}^1$

素因数の和:2522

約数の個数: 16

約数和(自身を含む): 25394208

約数和(自身を除く): 4136257

約数列:

[1, 11, 13, 61, 143, 671, 793, 2437, 8723, 26807, 31681, 148657, 348491, 1635227, 1932541, 21257951]

約数ペア:

[(1, 21257951), (11, 1932541), (13, 1635227), (61, 348491), (143, 148657), (671, 31681), (793, 26807), (2437, 8723)]