20781940

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9533}}^1$

素因数の和:9651

約数の個数: 24

約数和(自身を含む): 44047080

約数和(自身を除く): 23265140

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9533, 19066, 38132, 47665, 95330, 190660, 1039097, 2078194, 4156388, 5195485, 10390970, 20781940]

約数ペア:

[(1, 20781940), (2, 10390970), (4, 5195485), (5, 4156388), (10, 2078194), (20, 1039097), (109, 190660), (218, 95330), (436, 47665), (545, 38132), (1090, 19066), (2180, 9533)]