21691748

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{2657}}^1$

素因数の和:2831

約数の個数: 24

約数和(自身を含む): 41156472

約数和(自身を除く): 19464724

約数列:

[1, 2, 4, 13, 26, 52, 157, 314, 628, 2041, 2657, 4082, 5314, 8164, 10628, 34541, 69082, 138164, 417149, 834298, 1668596, 5422937, 10845874, 21691748]

約数ペア:

[(1, 21691748), (2, 10845874), (4, 5422937), (13, 1668596), (26, 834298), (52, 417149), (157, 138164), (314, 69082), (628, 34541), (2041, 10628), (2657, 8164), (4082, 5314)]