21783915

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11807}}^1$

素因数の和:11859

約数の個数: 24

約数和(自身を含む): 38683008

約数和(自身を除く): 16899093

約数列:

[1, 3, 5, 9, 15, 41, 45, 123, 205, 369, 615, 1845, 11807, 35421, 59035, 106263, 177105, 484087, 531315, 1452261, 2420435, 4356783, 7261305, 21783915]

約数ペア:

[(1, 21783915), (3, 7261305), (5, 4356783), (9, 2420435), (15, 1452261), (41, 531315), (45, 484087), (123, 177105), (205, 106263), (369, 59035), (615, 35421), (1845, 11807)]