638716

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{173}}^1$

素因数の和:261

約数の個数: 24

約数和(自身を含む): 1227744

約数和(自身を除く): 589028

約数列:

[1, 2, 4, 13, 26, 52, 71, 142, 173, 284, 346, 692, 923, 1846, 2249, 3692, 4498, 8996, 12283, 24566, 49132, 159679, 319358, 638716]

約数ペア:

[(1, 638716), (2, 319358), (4, 159679), (13, 49132), (26, 24566), (52, 12283), (71, 8996), (142, 4498), (173, 3692), (284, 2249), (346, 1846), (692, 923)]