13978820

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1087}}^1$

素因数の和:1739

約数の個数: 24

約数和(自身を含む): 29428224

約数和(自身を除く): 15449404

約数列:

[1, 2, 4, 5, 10, 20, 643, 1087, 1286, 2174, 2572, 3215, 4348, 5435, 6430, 10870, 12860, 21740, 698941, 1397882, 2795764, 3494705, 6989410, 13978820]

約数ペア:

[(1, 13978820), (2, 6989410), (4, 3494705), (5, 2795764), (10, 1397882), (20, 698941), (643, 21740), (1087, 12860), (1286, 10870), (2174, 6430), (2572, 5435), (3215, 4348)]