21287295

素因数分解:

$3^2\times 5^1\times {\mathrm{419}}^1\times {\mathrm{1129}}^1$

素因数の和:1559

約数の個数: 24

約数和(自身を含む): 37018800

約数和(自身を除く): 15731505

約数列:

[1, 3, 5, 9, 15, 45, 419, 1129, 1257, 2095, 3387, 3771, 5645, 6285, 10161, 16935, 18855, 50805, 473051, 1419153, 2365255, 4257459, 7095765, 21287295]

約数ペア:

[(1, 21287295), (3, 7095765), (5, 4257459), (9, 2365255), (15, 1419153), (45, 473051), (419, 50805), (1129, 18855), (1257, 16935), (2095, 10161), (3387, 6285), (3771, 5645)]