21729640

素因数分解:

$2^3\times 5^1\times {\mathrm{543241}}^1$

素因数の和:543252

約数の個数: 16

約数和(自身を含む): 48891780

約数和(自身を除く): 27162140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 543241, 1086482, 2172964, 2716205, 4345928, 5432410, 10864820, 21729640]

約数ペア:

[(1, 21729640), (2, 10864820), (4, 5432410), (5, 4345928), (8, 2716205), (10, 2172964), (20, 1086482), (40, 543241)]