21581612

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{415031}}^1$

素因数の和:415048

約数の個数: 12

約数和(自身を含む): 40673136

約数和(自身を除く): 19091524

約数列:

[1, 2, 4, 13, 26, 52, 415031, 830062, 1660124, 5395403, 10790806, 21581612]

約数ペア:

[(1, 21581612), (2, 10790806), (4, 5395403), (13, 1660124), (26, 830062), (52, 415031)]