638687529

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{43457}}^1$

素因数の和:43557

約数の個数: 24

約数和(自身を含む): 976240512

約数和(自身を除く): 337552983

約数列:

[1, 3, 9, 23, 69, 71, 207, 213, 639, 1633, 4899, 14697, 43457, 130371, 391113, 999511, 2998533, 3085447, 8995599, 9256341, 27769023, 70965281, 212895843, 638687529]

約数ペア:

[(1, 638687529), (3, 212895843), (9, 70965281), (23, 27769023), (69, 9256341), (71, 8995599), (207, 3085447), (213, 2998533), (639, 999511), (1633, 391113), (4899, 130371), (14697, 43457)]