13122020

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1289}}^1$

素因数の和:1807

約数の個数: 24

約数和(自身を含む): 27631800

約数和(自身を除く): 14509780

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 1289, 2036, 2545, 2578, 5090, 5156, 6445, 10180, 12890, 25780, 656101, 1312202, 2624404, 3280505, 6561010, 13122020]

約数ペア:

[(1, 13122020), (2, 6561010), (4, 3280505), (5, 2624404), (10, 1312202), (20, 656101), (509, 25780), (1018, 12890), (1289, 10180), (2036, 6445), (2545, 5156), (2578, 5090)]