21260365

素因数分解:

$5^1\times 7^2\times {\mathrm{107}}^1\times {\mathrm{811}}^1$

素因数の和:937

約数の個数: 24

約数和(自身を含む): 29992032

約数和(自身を除く): 8731667

約数列:

[1, 5, 7, 35, 49, 107, 245, 535, 749, 811, 3745, 4055, 5243, 5677, 26215, 28385, 39739, 86777, 198695, 433885, 607439, 3037195, 4252073, 21260365]

約数ペア:

[(1, 21260365), (5, 4252073), (7, 3037195), (35, 607439), (49, 433885), (107, 198695), (245, 86777), (535, 39739), (749, 28385), (811, 26215), (3745, 5677), (4055, 5243)]