19199920

素因数分解:

$2^4\times 5^1\times {\mathrm{239999}}^1$

素因数の和:240012

約数の個数: 20

約数和(自身を含む): 44640000

約数和(自身を除く): 25440080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 239999, 479998, 959996, 1199995, 1919992, 2399990, 3839984, 4799980, 9599960, 19199920]

約数ペア:

[(1, 19199920), (2, 9599960), (4, 4799980), (5, 3839984), (8, 2399990), (10, 1919992), (16, 1199995), (20, 959996), (40, 479998), (80, 239999)]