21890990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{1567}}^1$

素因数の和:1712

約数の個数: 32

約数和(自身を含む): 43352064

約数和(自身を除く): 21461074

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 127, 254, 635, 1270, 1397, 1567, 2794, 3134, 6985, 7835, 13970, 15670, 17237, 34474, 86185, 172370, 199009, 398018, 995045, 1990090, 2189099, 4378198, 10945495, 21890990]

約数ペア:

[(1, 21890990), (2, 10945495), (5, 4378198), (10, 2189099), (11, 1990090), (22, 995045), (55, 398018), (110, 199009), (127, 172370), (254, 86185), (635, 34474), (1270, 17237), (1397, 15670), (1567, 13970), (2794, 7835), (3134, 6985)]