21378555

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43189}}^1$

素因数の和:43211

約数の個数: 24

約数和(自身を含む): 40425840

約数和(自身を除く): 19047285

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 43189, 129567, 215945, 388701, 475079, 647835, 1425237, 1943505, 2375395, 4275711, 7126185, 21378555]

約数ペア:

[(1, 21378555), (3, 7126185), (5, 4275711), (9, 2375395), (11, 1943505), (15, 1425237), (33, 647835), (45, 475079), (55, 388701), (99, 215945), (165, 129567), (495, 43189)]