21685115

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{43}}^1\times {\mathrm{349}}^1$

素因数の和:431

約数の個数: 24

約数和(自身を含む): 28366800

約数和(自身を除く): 6681685

約数列:

[1, 5, 17, 43, 85, 215, 289, 349, 731, 1445, 1745, 3655, 5933, 12427, 15007, 29665, 62135, 75035, 100861, 255119, 504305, 1275595, 4337023, 21685115]

約数ペア:

[(1, 21685115), (5, 4337023), (17, 1275595), (43, 504305), (85, 255119), (215, 100861), (289, 75035), (349, 62135), (731, 29665), (1445, 15007), (1745, 12427), (3655, 5933)]