20899540

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{2053}}^1$

素因数の和:2571

約数の個数: 24

約数和(自身を含む): 43996680

約数和(自身を除く): 23097140

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 2036, 2053, 2545, 4106, 5090, 8212, 10180, 10265, 20530, 41060, 1044977, 2089954, 4179908, 5224885, 10449770, 20899540]

約数ペア:

[(1, 20899540), (2, 10449770), (4, 5224885), (5, 4179908), (10, 2089954), (20, 1044977), (509, 41060), (1018, 20530), (2036, 10265), (2053, 10180), (2545, 8212), (4106, 5090)]