4037980

素因数分解:

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

素因数の和:2109

約数の個数: 24

約数和(自身を含む): 8568000

約数和(自身を除く): 4530020

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 1999, 2020, 3998, 7996, 9995, 19990, 39980, 201899, 403798, 807596, 1009495, 2018990, 4037980]

約数ペア:

[(1, 4037980), (2, 2018990), (4, 1009495), (5, 807596), (10, 403798), (20, 201899), (101, 39980), (202, 19990), (404, 9995), (505, 7996), (1010, 3998), (1999, 2020)]