12689620

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{7129}}^1$

素因数の和:7227

約数の個数: 24

約数和(自身を含む): 26951400

約数和(自身を除く): 14261780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 7129, 14258, 28516, 35645, 71290, 142580, 634481, 1268962, 2537924, 3172405, 6344810, 12689620]

約数ペア:

[(1, 12689620), (2, 6344810), (4, 3172405), (5, 2537924), (10, 1268962), (20, 634481), (89, 142580), (178, 71290), (356, 35645), (445, 28516), (890, 14258), (1780, 7129)]