17919920

素因数分解:

$2^4\times 5^1\times {\mathrm{223999}}^1$

素因数の和:224012

約数の個数: 20

約数和(自身を含む): 41664000

約数和(自身を除く): 23744080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 223999, 447998, 895996, 1119995, 1791992, 2239990, 3583984, 4479980, 8959960, 17919920]

約数ペア:

[(1, 17919920), (2, 8959960), (4, 4479980), (5, 3583984), (8, 2239990), (10, 1791992), (16, 1119995), (20, 895996), (40, 447998), (80, 223999)]