21336980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{152407}}^1$

素因数の和:152423

約数の個数: 24

約数和(自身を含む): 51209088

約数和(自身を除く): 29872108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 152407, 304814, 609628, 762035, 1066849, 1524070, 2133698, 3048140, 4267396, 5334245, 10668490, 21336980]

約数ペア:

[(1, 21336980), (2, 10668490), (4, 5334245), (5, 4267396), (7, 3048140), (10, 2133698), (14, 1524070), (20, 1066849), (28, 762035), (35, 609628), (70, 304814), (140, 152407)]