21013915

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{2141}}^1$

素因数の和:2310

約数の個数: 16

約数和(自身を含む): 27349056

約数和(自身を除く): 6335141

約数列:

[1, 5, 13, 65, 151, 755, 1963, 2141, 9815, 10705, 27833, 139165, 323291, 1616455, 4202783, 21013915]

約数ペア:

[(1, 21013915), (5, 4202783), (13, 1616455), (65, 323291), (151, 139165), (755, 27833), (1963, 10705), (2141, 9815)]