318207920

素因数分解:

$2^4\times 5^1\times {\mathrm{3977599}}^1$

素因数の和:3977612

約数の個数: 20

約数和(自身を含む): 739833600

約数和(自身を除く): 421625680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3977599, 7955198, 15910396, 19887995, 31820792, 39775990, 63641584, 79551980, 159103960, 318207920]

約数ペア:

[(1, 318207920), (2, 159103960), (4, 79551980), (5, 63641584), (8, 39775990), (10, 31820792), (16, 19887995), (20, 15910396), (40, 7955198), (80, 3977599)]