80890900

素因数分解:

$2^2\times 5^2\times {\mathrm{101}}^1\times {\mathrm{8009}}^1$

素因数の和:8124

約数の個数: 36

約数和(自身を含む): 177293340

約数和(自身を除く): 96402440

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 101, 202, 404, 505, 1010, 2020, 2525, 5050, 8009, 10100, 16018, 32036, 40045, 80090, 160180, 200225, 400450, 800900, 808909, 1617818, 3235636, 4044545, 8089090, 16178180, 20222725, 40445450, 80890900]

約数ペア:

[(1, 80890900), (2, 40445450), (4, 20222725), (5, 16178180), (10, 8089090), (20, 4044545), (25, 3235636), (50, 1617818), (100, 808909), (101, 800900), (202, 400450), (404, 200225), (505, 160180), (1010, 80090), (2020, 40045), (2525, 32036), (5050, 16018), (8009, 10100)]