21000906380

素因数分解:

$2^2\times 5^1\times {\mathrm{449}}^1\times {\mathrm{2338631}}^1$

素因数の和:2339089

約数の個数: 24

約数和(自身を含む): 44200144800

約数和(自身を除く): 23199238420

約数列:

[1, 2, 4, 5, 10, 20, 449, 898, 1796, 2245, 4490, 8980, 2338631, 4677262, 9354524, 11693155, 23386310, 46772620, 1050045319, 2100090638, 4200181276, 5250226595, 10500453190, 21000906380]

約数ペア:

[(1, 21000906380), (2, 10500453190), (4, 5250226595), (5, 4200181276), (10, 2100090638), (20, 1050045319), (449, 46772620), (898, 23386310), (1796, 11693155), (2245, 9354524), (4490, 4677262), (8980, 2338631)]