71808080

素因数分解:

$2^4\times 5^1\times {\mathrm{897601}}^1$

素因数の和:897614

約数の個数: 20

約数和(自身を含む): 166953972

約数和(自身を除く): 95145892

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 897601, 1795202, 3590404, 4488005, 7180808, 8976010, 14361616, 17952020, 35904040, 71808080]

約数ペア:

[(1, 71808080), (2, 35904040), (4, 17952020), (5, 14361616), (8, 8976010), (10, 7180808), (16, 4488005), (20, 3590404), (40, 1795202), (80, 897601)]