31208080

素因数分解:

$2^4\times 5^1\times {\mathrm{390101}}^1$

素因数の和:390114

約数の個数: 20

約数和(自身を含む): 72558972

約数和(自身を除く): 41350892

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 390101, 780202, 1560404, 1950505, 3120808, 3901010, 6241616, 7802020, 15604040, 31208080]

約数ペア:

[(1, 31208080), (2, 15604040), (4, 7802020), (5, 6241616), (8, 3901010), (10, 3120808), (16, 1950505), (20, 1560404), (40, 780202), (80, 390101)]