21255115

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{487}}^1$

素因数の和:571

約数の個数: 32

約数和(自身を含む): 30919680

約数和(自身を除く): 9664565

約数列:

[1, 5, 7, 29, 35, 43, 145, 203, 215, 301, 487, 1015, 1247, 1505, 2435, 3409, 6235, 8729, 14123, 17045, 20941, 43645, 70615, 98861, 104705, 146587, 494305, 607289, 732935, 3036445, 4251023, 21255115]

約数ペア:

[(1, 21255115), (5, 4251023), (7, 3036445), (29, 732935), (35, 607289), (43, 494305), (145, 146587), (203, 104705), (215, 98861), (301, 70615), (487, 43645), (1015, 20941), (1247, 17045), (1505, 14123), (2435, 8729), (3409, 6235)]