20731221

素因数分解:

$3^4\times 7^1\times {\mathrm{36563}}^1$

素因数の和:36582

約数の個数: 20

約数和(自身を含む): 35393952

約数和(自身を除く): 14662731

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 36563, 109689, 255941, 329067, 767823, 987201, 2303469, 2961603, 6910407, 20731221]

約数ペア:

[(1, 20731221), (3, 6910407), (7, 2961603), (9, 2303469), (21, 987201), (27, 767823), (63, 329067), (81, 255941), (189, 109689), (567, 36563)]