21528572

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{31847}}^1$

素因数の和:31877

約数の個数: 18

約数和(自身を含む): 40797288

約数和(自身を除く): 19268716

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 31847, 63694, 127388, 414011, 828022, 1656044, 5382143, 10764286, 21528572]

約数ペア:

[(1, 21528572), (2, 10764286), (4, 5382143), (13, 1656044), (26, 828022), (52, 414011), (169, 127388), (338, 63694), (676, 31847)]