31199920

素因数分解:

$2^4\times 5^1\times {\mathrm{389999}}^1$

素因数の和:390012

約数の個数: 20

約数和(自身を含む): 72540000

約数和(自身を除く): 41340080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 389999, 779998, 1559996, 1949995, 3119992, 3899990, 6239984, 7799980, 15599960, 31199920]

約数ペア:

[(1, 31199920), (2, 15599960), (4, 7799980), (5, 6239984), (8, 3899990), (10, 3119992), (16, 1949995), (20, 1559996), (40, 779998), (80, 389999)]