21172665

素因数分解:

$3^1\times 5^1\times {\mathrm{137}}^1\times {\mathrm{10303}}^1$

素因数の和:10448

約数の個数: 16

約数和(自身を含む): 34126848

約数和(自身を除く): 12954183

約数列:

[1, 3, 5, 15, 137, 411, 685, 2055, 10303, 30909, 51515, 154545, 1411511, 4234533, 7057555, 21172665]

約数ペア:

[(1, 21172665), (3, 7057555), (5, 4234533), (15, 1411511), (137, 154545), (411, 51515), (685, 30909), (2055, 10303)]