21289965

素因数分解:

$3^1\times 5^1\times {\mathrm{281}}^1\times {\mathrm{5051}}^1$

素因数の和:5340

約数の個数: 16

約数和(自身を含む): 34191936

約数和(自身を除く): 12901971

約数列:

[1, 3, 5, 15, 281, 843, 1405, 4215, 5051, 15153, 25255, 75765, 1419331, 4257993, 7096655, 21289965]

約数ペア:

[(1, 21289965), (3, 7096655), (5, 4257993), (15, 1419331), (281, 75765), (843, 25255), (1405, 15153), (4215, 5051)]