256580121

素因数分解:

$3^1\times 7^3\times {\mathrm{389}}^1\times {\mathrm{641}}^1$

素因数の和:1054

約数の個数: 32

約数和(自身を含む): 400608000

約数和(自身を除く): 144027879

約数列:

[1, 3, 7, 21, 49, 147, 343, 389, 641, 1029, 1167, 1923, 2723, 4487, 8169, 13461, 19061, 31409, 57183, 94227, 133427, 219863, 249349, 400281, 659589, 748047, 1745443, 5236329, 12218101, 36654303, 85526707, 256580121]

約数ペア:

[(1, 256580121), (3, 85526707), (7, 36654303), (21, 12218101), (49, 5236329), (147, 1745443), (343, 748047), (389, 659589), (641, 400281), (1029, 249349), (1167, 219863), (1923, 133427), (2723, 94227), (4487, 57183), (8169, 31409), (13461, 19061)]