257661621

素因数分解:

$3^3\times 7^1\times {\mathrm{61}}^1\times {\mathrm{22349}}^1$

素因数の和:22426

約数の個数: 32

約数和(自身を含む): 443424000

約数和(自身を除く): 185762379

約数列:

[1, 3, 7, 9, 21, 27, 61, 63, 183, 189, 427, 549, 1281, 1647, 3843, 11529, 22349, 67047, 156443, 201141, 469329, 603423, 1363289, 1407987, 4089867, 4223961, 9543023, 12269601, 28629069, 36808803, 85887207, 257661621]

約数ペア:

[(1, 257661621), (3, 85887207), (7, 36808803), (9, 28629069), (21, 12269601), (27, 9543023), (61, 4223961), (63, 4089867), (183, 1407987), (189, 1363289), (427, 603423), (549, 469329), (1281, 201141), (1647, 156443), (3843, 67047), (11529, 22349)]