21064580

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4723}}^1$

素因数の和:4955

約数の個数: 24

約数和(自身を含む): 44443392

約数和(自身を除く): 23378812

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 4723, 9446, 18892, 23615, 47230, 94460, 1053229, 2106458, 4212916, 5266145, 10532290, 21064580]

約数ペア:

[(1, 21064580), (2, 10532290), (4, 5266145), (5, 4212916), (10, 2106458), (20, 1053229), (223, 94460), (446, 47230), (892, 23615), (1115, 18892), (2230, 9446), (4460, 4723)]