21309659

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{487}}^1$

素因数の和:567

約数の個数: 24

約数和(自身を含む): 26703360

約数和(自身を除く): 5393701

約数列:

[1, 7, 19, 47, 49, 133, 329, 487, 893, 931, 2303, 3409, 6251, 9253, 22889, 23863, 43757, 64771, 160223, 434891, 453397, 1121561, 3044237, 21309659]

約数ペア:

[(1, 21309659), (7, 3044237), (19, 1121561), (47, 453397), (49, 434891), (133, 160223), (329, 64771), (487, 43757), (893, 23863), (931, 22889), (2303, 9253), (3409, 6251)]