128580557

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{271}}^1\times {\mathrm{421}}^1$

素因数の和:729

約数の個数: 24

約数和(自身を含む): 157024512

約数和(自身を除く): 28443955

約数列:

[1, 7, 23, 49, 161, 271, 421, 1127, 1897, 2947, 6233, 9683, 13279, 20629, 43631, 67781, 114091, 305417, 474467, 798637, 2624093, 5590459, 18368651, 128580557]

約数ペア:

[(1, 128580557), (7, 18368651), (23, 5590459), (49, 2624093), (161, 798637), (271, 474467), (421, 305417), (1127, 114091), (1897, 67781), (2947, 43631), (6233, 20629), (9683, 13279)]