21301945

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{311}}^1$

素因数の和:445

約数の個数: 32

約数和(自身を含む): 31150080

約数和(自身を除く): 9848135

約数列:

[1, 5, 7, 19, 35, 95, 103, 133, 311, 515, 665, 721, 1555, 1957, 2177, 3605, 5909, 9785, 10885, 13699, 29545, 32033, 41363, 68495, 160165, 206815, 224231, 608627, 1121155, 3043135, 4260389, 21301945]

約数ペア:

[(1, 21301945), (5, 4260389), (7, 3043135), (19, 1121155), (35, 608627), (95, 224231), (103, 206815), (133, 160165), (311, 68495), (515, 41363), (665, 32033), (721, 29545), (1555, 13699), (1957, 10885), (2177, 9785), (3605, 5909)]