21781097

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{1471}}^1$

素因数の和:1568

約数の個数: 16

約数和(自身を含む): 25224192

約数和(自身を除く): 3443095

約数列:

[1, 13, 17, 67, 221, 871, 1139, 1471, 14807, 19123, 25007, 98557, 325091, 1281241, 1675469, 21781097]

約数ペア:

[(1, 21781097), (13, 1675469), (17, 1281241), (67, 325091), (221, 98557), (871, 25007), (1139, 19123), (1471, 14807)]