20641495

素因数分解:

$5^1\times 7^2\times {\mathrm{173}}^1\times {\mathrm{487}}^1$

素因数の和:679

約数の個数: 24

約数和(自身を含む): 29039904

約数和(自身を除く): 8398409

約数列:

[1, 5, 7, 35, 49, 173, 245, 487, 865, 1211, 2435, 3409, 6055, 8477, 17045, 23863, 42385, 84251, 119315, 421255, 589757, 2948785, 4128299, 20641495]

約数ペア:

[(1, 20641495), (5, 4128299), (7, 2948785), (35, 589757), (49, 421255), (173, 119315), (245, 84251), (487, 42385), (865, 23863), (1211, 17045), (2435, 8477), (3409, 6055)]