21286515

素因数分解:

$3^1\times 5^1\times {\mathrm{643}}^1\times {\mathrm{2207}}^1$

素因数の和:2858

約数の個数: 16

約数和(自身を含む): 34126848

約数和(自身を除く): 12840333

約数列:

[1, 3, 5, 15, 643, 1929, 2207, 3215, 6621, 9645, 11035, 33105, 1419101, 4257303, 7095505, 21286515]

約数ペア:

[(1, 21286515), (3, 7095505), (5, 4257303), (15, 1419101), (643, 33105), (1929, 11035), (2207, 9645), (3215, 6621)]