21491595

素因数分解:

$3^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{401}}^1$

素因数の和:812

約数の個数: 32

約数和(自身を含む): 38399040

約数和(自身を除く): 16907445

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 397, 401, 1191, 1203, 1985, 2005, 3573, 3609, 5955, 6015, 10719, 10827, 17865, 18045, 53595, 54135, 159197, 477591, 795985, 1432773, 2387955, 4298319, 7163865, 21491595]

約数ペア:

[(1, 21491595), (3, 7163865), (5, 4298319), (9, 2387955), (15, 1432773), (27, 795985), (45, 477591), (135, 159197), (397, 54135), (401, 53595), (1191, 18045), (1203, 17865), (1985, 10827), (2005, 10719), (3573, 6015), (3609, 5955)]