21220615

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{2383}}^1$

素因数の和:2538

約数の個数: 16

約数和(自身を含む): 27635328

約数和(自身を除く): 6414713

約数列:

[1, 5, 13, 65, 137, 685, 1781, 2383, 8905, 11915, 30979, 154895, 326471, 1632355, 4244123, 21220615]

約数ペア:

[(1, 21220615), (5, 4244123), (13, 1632355), (65, 326471), (137, 154895), (685, 30979), (1781, 11915), (2383, 8905)]