12940220

素因数分解:

$2^2\times 5^1\times {\mathrm{647011}}^1$

素因数の和:647020

約数の個数: 12

約数和(自身を含む): 27174504

約数和(自身を除く): 14234284

約数列:

[1, 2, 4, 5, 10, 20, 647011, 1294022, 2588044, 3235055, 6470110, 12940220]

約数ペア:

[(1, 12940220), (2, 6470110), (4, 3235055), (5, 2588044), (10, 1294022), (20, 647011)]