21854510

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{30781}}^1$

素因数の和:30859

約数の個数: 16

約数和(自身を含む): 39893472

約数和(自身を除く): 18038962

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 30781, 61562, 153905, 307810, 2185451, 4370902, 10927255, 21854510]

約数ペア:

[(1, 21854510), (2, 10927255), (5, 4370902), (10, 2185451), (71, 307810), (142, 153905), (355, 61562), (710, 30781)]