21341620

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{2609}}^1$

素因数の和:3027

約数の個数: 24

約数和(自身を含む): 44944200

約数和(自身を除く): 23602580

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 2609, 4090, 5218, 8180, 10436, 13045, 26090, 52180, 1067081, 2134162, 4268324, 5335405, 10670810, 21341620]

約数ペア:

[(1, 21341620), (2, 10670810), (4, 5335405), (5, 4268324), (10, 2134162), (20, 1067081), (409, 52180), (818, 26090), (1636, 13045), (2045, 10436), (2609, 8180), (4090, 5218)]