21091340

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4729}}^1$

素因数の和:4961

約数の個数: 24

約数和(自身を含む): 44499840

約数和(自身を除く): 23408500

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 4729, 9458, 18916, 23645, 47290, 94580, 1054567, 2109134, 4218268, 5272835, 10545670, 21091340]

約数ペア:

[(1, 21091340), (2, 10545670), (4, 5272835), (5, 4218268), (10, 2109134), (20, 1054567), (223, 94580), (446, 47290), (892, 23645), (1115, 18916), (2230, 9458), (4460, 4729)]