21491385

素因数分解:

$3^1\times 5^1\times {\mathrm{449}}^1\times {\mathrm{3191}}^1$

素因数の和:3648

約数の個数: 16

約数和(自身を含む): 34473600

約数和(自身を除く): 12982215

約数列:

[1, 3, 5, 15, 449, 1347, 2245, 3191, 6735, 9573, 15955, 47865, 1432759, 4298277, 7163795, 21491385]

約数ペア:

[(1, 21491385), (3, 7163795), (5, 4298277), (15, 1432759), (449, 47865), (1347, 15955), (2245, 9573), (3191, 6735)]