21751420

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4877}}^1$

素因数の和:5109

約数の個数: 24

約数和(自身を含む): 45892224

約数和(自身を除く): 24140804

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 4877, 9754, 19508, 24385, 48770, 97540, 1087571, 2175142, 4350284, 5437855, 10875710, 21751420]

約数ペア:

[(1, 21751420), (2, 10875710), (4, 5437855), (5, 4350284), (10, 2175142), (20, 1087571), (223, 97540), (446, 48770), (892, 24385), (1115, 19508), (2230, 9754), (4460, 4877)]