77807920

素因数分解:

$2^4\times 5^1\times {\mathrm{972599}}^1$

素因数の和:972612

約数の個数: 20

約数和(自身を含む): 180903600

約数和(自身を除く): 103095680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 972599, 1945198, 3890396, 4862995, 7780792, 9725990, 15561584, 19451980, 38903960, 77807920]

約数ペア:

[(1, 77807920), (2, 38903960), (4, 19451980), (5, 15561584), (8, 9725990), (10, 7780792), (16, 4862995), (20, 3890396), (40, 1945198), (80, 972599)]