21291080

素因数分解:

$2^3\times 5^1\times {\mathrm{532277}}^1$

素因数の和:532288

約数の個数: 16

約数和(自身を含む): 47905020

約数和(自身を除く): 26613940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 532277, 1064554, 2129108, 2661385, 4258216, 5322770, 10645540, 21291080]

約数ペア:

[(1, 21291080), (2, 10645540), (4, 5322770), (5, 4258216), (8, 2661385), (10, 2129108), (20, 1064554), (40, 532277)]