28271920

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{3499}}^1$

素因数の和:3613

約数の個数: 40

約数和(自身を含む): 66402000

約数和(自身を除く): 38130080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 3499, 4040, 6998, 8080, 13996, 17495, 27992, 34990, 55984, 69980, 139960, 279920, 353399, 706798, 1413596, 1766995, 2827192, 3533990, 5654384, 7067980, 14135960, 28271920]

約数ペア:

[(1, 28271920), (2, 14135960), (4, 7067980), (5, 5654384), (8, 3533990), (10, 2827192), (16, 1766995), (20, 1413596), (40, 706798), (80, 353399), (101, 279920), (202, 139960), (404, 69980), (505, 55984), (808, 34990), (1010, 27992), (1616, 17495), (2020, 13996), (3499, 8080), (4040, 6998)]