20120247

素因数分解:

$3^2\times 7^1\times {\mathrm{389}}^1\times {\mathrm{821}}^1$

素因数の和:1223

約数の個数: 24

約数和(自身を含む): 33340320

約数和(自身を除く): 13220073

約数列:

[1, 3, 7, 9, 21, 63, 389, 821, 1167, 2463, 2723, 3501, 5747, 7389, 8169, 17241, 24507, 51723, 319369, 958107, 2235583, 2874321, 6706749, 20120247]

約数ペア:

[(1, 20120247), (3, 6706749), (7, 2874321), (9, 2235583), (21, 958107), (63, 319369), (389, 51723), (821, 24507), (1167, 17241), (2463, 8169), (2723, 7389), (3501, 5747)]