21095397

素因数分解:

$3^4\times {\mathrm{137}}^1\times {\mathrm{1901}}^1$

素因数の和:2050

約数の個数: 20

約数和(自身を含む): 31759596

約数和(自身を除く): 10664199

約数列:

[1, 3, 9, 27, 81, 137, 411, 1233, 1901, 3699, 5703, 11097, 17109, 51327, 153981, 260437, 781311, 2343933, 7031799, 21095397]

約数ペア:

[(1, 21095397), (3, 7031799), (9, 2343933), (27, 781311), (81, 260437), (137, 153981), (411, 51327), (1233, 17109), (1901, 11097), (3699, 5703)]