21240255

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{34537}}^1$

素因数の和:34586

約数の個数: 16

約数和(自身を含む): 34814304

約数和(自身を除く): 13574049

約数列:

[1, 3, 5, 15, 41, 123, 205, 615, 34537, 103611, 172685, 518055, 1416017, 4248051, 7080085, 21240255]

約数ペア:

[(1, 21240255), (3, 7080085), (5, 4248051), (15, 1416017), (41, 518055), (123, 172685), (205, 103611), (615, 34537)]