131199920

素因数分解:

$2^4\times 5^1\times {\mathrm{1639999}}^1$

素因数の和:1640012

約数の個数: 20

約数和(自身を含む): 305040000

約数和(自身を除く): 173840080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1639999, 3279998, 6559996, 8199995, 13119992, 16399990, 26239984, 32799980, 65599960, 131199920]

約数ペア:

[(1, 131199920), (2, 65599960), (4, 32799980), (5, 26239984), (8, 16399990), (10, 13119992), (16, 8199995), (20, 6559996), (40, 3279998), (80, 1639999)]