21861550

素因数分解:

$2^1\times 5^2\times {\mathrm{509}}^1\times {\mathrm{859}}^1$

素因数の和:1380

約数の個数: 24

約数和(自身を含む): 40789800

約数和(自身を除く): 18928250

約数列:

[1, 2, 5, 10, 25, 50, 509, 859, 1018, 1718, 2545, 4295, 5090, 8590, 12725, 21475, 25450, 42950, 437231, 874462, 2186155, 4372310, 10930775, 21861550]

約数ペア:

[(1, 21861550), (2, 10930775), (5, 4372310), (10, 2186155), (25, 874462), (50, 437231), (509, 42950), (859, 25450), (1018, 21475), (1718, 12725), (2545, 8590), (4295, 5090)]