20172565

素因数分解:

$5^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{601}}^1$

素因数の和:757

約数の個数: 24

約数和(自身を含む): 28411992

約数和(自身を除く): 8239427

約数列:

[1, 5, 7, 35, 49, 137, 245, 601, 685, 959, 3005, 4207, 4795, 6713, 21035, 29449, 33565, 82337, 147245, 411685, 576359, 2881795, 4034513, 20172565]

約数ペア:

[(1, 20172565), (5, 4034513), (7, 2881795), (35, 576359), (49, 411685), (137, 147245), (245, 82337), (601, 33565), (685, 29449), (959, 21035), (3005, 6713), (4207, 4795)]