21304810

素因数分解:

$2^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{5209}}^1$

素因数の和:5625

約数の個数: 16

約数和(自身を含む): 38449800

約数和(自身を除く): 17144990

約数列:

[1, 2, 5, 10, 409, 818, 2045, 4090, 5209, 10418, 26045, 52090, 2130481, 4260962, 10652405, 21304810]

約数ペア:

[(1, 21304810), (2, 10652405), (5, 4260962), (10, 2130481), (409, 52090), (818, 26045), (2045, 10418), (4090, 5209)]