21806785

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{4357}}^1$

素因数の和:4393

約数の個数: 32

約数和(自身を含む): 35142912

約数和(自身を除く): 13336127

約数列:

[1, 5, 7, 11, 13, 35, 55, 65, 77, 91, 143, 385, 455, 715, 1001, 4357, 5005, 21785, 30499, 47927, 56641, 152495, 239635, 283205, 335489, 396487, 623051, 1677445, 1982435, 3115255, 4361357, 21806785]

約数ペア:

[(1, 21806785), (5, 4361357), (7, 3115255), (11, 1982435), (13, 1677445), (35, 623051), (55, 396487), (65, 335489), (77, 283205), (91, 239635), (143, 152495), (385, 56641), (455, 47927), (715, 30499), (1001, 21785), (4357, 5005)]