21809745

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11821}}^1$

素因数の和:11873

約数の個数: 24

約数和(自身を含む): 38728872

約数和(自身を除く): 16919127

約数列:

[1, 3, 5, 9, 15, 41, 45, 123, 205, 369, 615, 1845, 11821, 35463, 59105, 106389, 177315, 484661, 531945, 1453983, 2423305, 4361949, 7269915, 21809745]

約数ペア:

[(1, 21809745), (3, 7269915), (5, 4361949), (9, 2423305), (15, 1453983), (41, 531945), (45, 484661), (123, 177315), (205, 106389), (369, 59105), (615, 35463), (1845, 11821)]