20989085

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{2357}}^1$

素因数の和:2512

約数の個数: 16

約数和(自身を含む): 27333936

約数和(自身を除く): 6344851

約数列:

[1, 5, 13, 65, 137, 685, 1781, 2357, 8905, 11785, 30641, 153205, 322909, 1614545, 4197817, 20989085]

約数ペア:

[(1, 20989085), (5, 4197817), (13, 1614545), (65, 322909), (137, 153205), (685, 30641), (1781, 11785), (2357, 8905)]