18781960

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4649}}^1$

素因数の和:4761

約数の個数: 32

約数和(自身を含む): 42687000

約数和(自身を除く): 23905040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 4649, 9298, 18596, 23245, 37192, 46490, 92980, 185960, 469549, 939098, 1878196, 2347745, 3756392, 4695490, 9390980, 18781960]

約数ペア:

[(1, 18781960), (2, 9390980), (4, 4695490), (5, 3756392), (8, 2347745), (10, 1878196), (20, 939098), (40, 469549), (101, 185960), (202, 92980), (404, 46490), (505, 37192), (808, 23245), (1010, 18596), (2020, 9298), (4040, 4649)]