21307215

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{30223}}^1$

素因数の和:30278

約数の個数: 16

約数和(自身を含む): 34818048

約数和(自身を除く): 13510833

約数列:

[1, 3, 5, 15, 47, 141, 235, 705, 30223, 90669, 151115, 453345, 1420481, 4261443, 7102405, 21307215]

約数ペア:

[(1, 21307215), (3, 7102405), (5, 4261443), (15, 1420481), (47, 453345), (141, 151115), (235, 90669), (705, 30223)]