19904980

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4463}}^1$

素因数の和:4695

約数の個数: 24

約数和(自身を含む): 41997312

約数和(自身を除く): 22092332

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 4463, 8926, 17852, 22315, 44630, 89260, 995249, 1990498, 3980996, 4976245, 9952490, 19904980]

約数ペア:

[(1, 19904980), (2, 9952490), (4, 4976245), (5, 3980996), (10, 1990498), (20, 995249), (223, 89260), (446, 44630), (892, 22315), (1115, 17852), (2230, 8926), (4460, 4463)]