21219760

素因数分解:

$2^4\times 5^1\times {\mathrm{265247}}^1$

素因数の和:265260

約数の個数: 20

約数和(自身を含む): 49336128

約数和(自身を除く): 28116368

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265247, 530494, 1060988, 1326235, 2121976, 2652470, 4243952, 5304940, 10609880, 21219760]

約数ペア:

[(1, 21219760), (2, 10609880), (4, 5304940), (5, 4243952), (8, 2652470), (10, 2121976), (16, 1326235), (20, 1060988), (40, 530494), (80, 265247)]