16151920

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{1999}}^1$

素因数の和:2113

約数の個数: 40

約数和(自身を含む): 37944000

約数和(自身を除く): 21792080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 1999, 2020, 3998, 4040, 7996, 8080, 9995, 15992, 19990, 31984, 39980, 79960, 159920, 201899, 403798, 807596, 1009495, 1615192, 2018990, 3230384, 4037980, 8075960, 16151920]

約数ペア:

[(1, 16151920), (2, 8075960), (4, 4037980), (5, 3230384), (8, 2018990), (10, 1615192), (16, 1009495), (20, 807596), (40, 403798), (80, 201899), (101, 159920), (202, 79960), (404, 39980), (505, 31984), (808, 19990), (1010, 15992), (1616, 9995), (1999, 8080), (2020, 7996), (3998, 4040)]