21020724

素因数分解:

$2^2\times 3^2\times {\mathrm{583909}}^1$

素因数の和:583919

約数の個数: 18

約数和(自身を含む): 53135810

約数和(自身を除く): 32115086

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 583909, 1167818, 1751727, 2335636, 3503454, 5255181, 7006908, 10510362, 21020724]

約数ペア:

[(1, 21020724), (2, 10510362), (3, 7006908), (4, 5255181), (6, 3503454), (9, 2335636), (12, 1751727), (18, 1167818), (36, 583909)]