21287945

素因数分解:

$5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{12941}}^1$

素因数の和:13000

約数の個数: 16

約数和(自身を含む): 29818368

約数和(自身を除く): 8530423

約数列:

[1, 5, 7, 35, 47, 235, 329, 1645, 12941, 64705, 90587, 452935, 608227, 3041135, 4257589, 21287945]

約数ペア:

[(1, 21287945), (5, 4257589), (7, 3041135), (35, 608227), (47, 452935), (235, 90587), (329, 64705), (1645, 12941)]