21289640

素因数分解:

$2^3\times 5^1\times {\mathrm{532241}}^1$

素因数の和:532252

約数の個数: 16

約数和(自身を含む): 47901780

約数和(自身を除く): 26612140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 532241, 1064482, 2128964, 2661205, 4257928, 5322410, 10644820, 21289640]

約数ペア:

[(1, 21289640), (2, 10644820), (4, 5322410), (5, 4257928), (8, 2661205), (10, 2128964), (20, 1064482), (40, 532241)]