280040

素因数分解:

$2^3\times 5^1\times {\mathrm{7001}}^1$

素因数の和:7012

約数の個数: 16

約数和(自身を含む): 630180

約数和(自身を除く): 350140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 7001, 14002, 28004, 35005, 56008, 70010, 140020, 280040]

約数ペア:

[(1, 280040), (2, 140020), (4, 70010), (5, 56008), (8, 35005), (10, 28004), (20, 14002), (40, 7001)]