18688220

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{10499}}^1$

素因数の和:10597

約数の個数: 24

約数和(自身を含む): 39690000

約数和(自身を除く): 21001780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 10499, 20998, 41996, 52495, 104990, 209980, 934411, 1868822, 3737644, 4672055, 9344110, 18688220]

約数ペア:

[(1, 18688220), (2, 9344110), (4, 4672055), (5, 3737644), (10, 1868822), (20, 934411), (89, 209980), (178, 104990), (356, 52495), (445, 41996), (890, 20998), (1780, 10499)]