31200080

素因数分解:

$2^4\times 5^1\times {\mathrm{390001}}^1$

素因数の和:390014

約数の個数: 20

約数和(自身を含む): 72540372

約数和(自身を除く): 41340292

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 390001, 780002, 1560004, 1950005, 3120008, 3900010, 6240016, 7800020, 15600040, 31200080]

約数ペア:

[(1, 31200080), (2, 15600040), (4, 7800020), (5, 6240016), (8, 3900010), (10, 3120008), (16, 1950005), (20, 1560004), (40, 780002), (80, 390001)]