12891020

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{1531}}^1$

素因数の和:1961

約数の個数: 24

約数和(自身を含む): 27153168

約数和(自身を除く): 14262148

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1531, 1684, 2105, 3062, 4210, 6124, 7655, 8420, 15310, 30620, 644551, 1289102, 2578204, 3222755, 6445510, 12891020]

約数ペア:

[(1, 12891020), (2, 6445510), (4, 3222755), (5, 2578204), (10, 1289102), (20, 644551), (421, 30620), (842, 15310), (1531, 8420), (1684, 7655), (2105, 6124), (3062, 4210)]