21909404

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{449}}^1\times {\mathrm{1109}}^1$

素因数の和:1573

約数の個数: 24

約数和(自身を含む): 41958000

約数和(自身を除く): 20048596

約数列:

[1, 2, 4, 11, 22, 44, 449, 898, 1109, 1796, 2218, 4436, 4939, 9878, 12199, 19756, 24398, 48796, 497941, 995882, 1991764, 5477351, 10954702, 21909404]

約数ペア:

[(1, 21909404), (2, 10954702), (4, 5477351), (11, 1991764), (22, 995882), (44, 497941), (449, 48796), (898, 24398), (1109, 19756), (1796, 12199), (2218, 9878), (4436, 4939)]