21491955

素因数分解:

$3^2\times 5^1\times {\mathrm{433}}^1\times {\mathrm{1103}}^1$

素因数の和:1547

約数の個数: 24

約数和(自身を含む): 37372608

約数和(自身を除く): 15880653

約数列:

[1, 3, 5, 9, 15, 45, 433, 1103, 1299, 2165, 3309, 3897, 5515, 6495, 9927, 16545, 19485, 49635, 477599, 1432797, 2387995, 4298391, 7163985, 21491955]

約数ペア:

[(1, 21491955), (3, 7163985), (5, 4298391), (9, 2387995), (15, 1432797), (45, 477599), (433, 49635), (1103, 19485), (1299, 16545), (2165, 9927), (3309, 6495), (3897, 5515)]