21121640

素因数分解:

$2^3\times 5^1\times {\mathrm{528041}}^1$

素因数の和:528052

約数の個数: 16

約数和(自身を含む): 47523780

約数和(自身を除く): 26402140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 528041, 1056082, 2112164, 2640205, 4224328, 5280410, 10560820, 21121640]

約数ペア:

[(1, 21121640), (2, 10560820), (4, 5280410), (5, 4224328), (8, 2640205), (10, 2112164), (20, 1056082), (40, 528041)]