21081135

素因数分解:

$3^1\times 5^1\times {\mathrm{311}}^1\times {\mathrm{4519}}^1$

素因数の和:4838

約数の個数: 16

約数和(自身を含む): 33845760

約数和(自身を除く): 12764625

約数列:

[1, 3, 5, 15, 311, 933, 1555, 4519, 4665, 13557, 22595, 67785, 1405409, 4216227, 7027045, 21081135]

約数ペア:

[(1, 21081135), (3, 7027045), (5, 4216227), (15, 1405409), (311, 67785), (933, 22595), (1555, 13557), (4519, 4665)]