21293456

素因数分解:

$2^4\times {\mathrm{821}}^1\times {\mathrm{1621}}^1$

素因数の和:2450

約数の個数: 20

約数和(自身を含む): 41331804

約数和(自身を除く): 20038348

約数列:

[1, 2, 4, 8, 16, 821, 1621, 1642, 3242, 3284, 6484, 6568, 12968, 13136, 25936, 1330841, 2661682, 5323364, 10646728, 21293456]

約数ペア:

[(1, 21293456), (2, 10646728), (4, 5323364), (8, 2661682), (16, 1330841), (821, 25936), (1621, 13136), (1642, 12968), (3242, 6568), (3284, 6484)]