20945564

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{18119}}^1$

素因数の和:18157

約数の個数: 18

約数和(自身を含む): 38939880

約数和(自身を除く): 17994316

約数列:

[1, 2, 4, 17, 34, 68, 289, 578, 1156, 18119, 36238, 72476, 308023, 616046, 1232092, 5236391, 10472782, 20945564]

約数ペア:

[(1, 20945564), (2, 10472782), (4, 5236391), (17, 1232092), (34, 616046), (68, 308023), (289, 72476), (578, 36238), (1156, 18119)]