21152021

素因数分解:

${\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{163}}^1\times {\mathrm{251}}^1$

素因数の和:472

約数の個数: 16

約数和(自身を含む): 23804928

約数和(自身を除く): 2652907

約数列:

[1, 11, 47, 163, 251, 517, 1793, 2761, 7661, 11797, 40913, 84271, 129767, 450043, 1922911, 21152021]

約数ペア:

[(1, 21152021), (11, 1922911), (47, 450043), (163, 129767), (251, 84271), (517, 40913), (1793, 11797), (2761, 7661)]