12745520

素因数分解:

$2^4\times 5^1\times {\mathrm{159319}}^1$

素因数の和:159332

約数の個数: 20

約数和(自身を含む): 29633520

約数和(自身を除く): 16888000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 159319, 318638, 637276, 796595, 1274552, 1593190, 2549104, 3186380, 6372760, 12745520]

約数ペア:

[(1, 12745520), (2, 6372760), (4, 3186380), (5, 2549104), (8, 1593190), (10, 1274552), (16, 796595), (20, 637276), (40, 318638), (80, 159319)]