21017540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{24439}}^1$

素因数の和:24491

約数の個数: 24

約数和(自身を含む): 45165120

約数和(自身を除く): 24147580

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 24439, 48878, 97756, 122195, 244390, 488780, 1050877, 2101754, 4203508, 5254385, 10508770, 21017540]

約数ペア:

[(1, 21017540), (2, 10508770), (4, 5254385), (5, 4203508), (10, 2101754), (20, 1050877), (43, 488780), (86, 244390), (172, 122195), (215, 97756), (430, 48878), (860, 24439)]