20821456

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{19423}}^1$

素因数の和:19498

約数の個数: 20

約数和(自身を含む): 40945792

約数和(自身を除く): 20124336

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 19423, 38846, 77692, 155384, 310768, 1301341, 2602682, 5205364, 10410728, 20821456]

約数ペア:

[(1, 20821456), (2, 10410728), (4, 5205364), (8, 2602682), (16, 1301341), (67, 310768), (134, 155384), (268, 77692), (536, 38846), (1072, 19423)]