20595920

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2549}}^1$

素因数の和:2663

約数の個数: 40

約数和(自身を含む): 48378600

約数和(自身を除く): 27782680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 2549, 4040, 5098, 8080, 10196, 12745, 20392, 25490, 40784, 50980, 101960, 203920, 257449, 514898, 1029796, 1287245, 2059592, 2574490, 4119184, 5148980, 10297960, 20595920]

約数ペア:

[(1, 20595920), (2, 10297960), (4, 5148980), (5, 4119184), (8, 2574490), (10, 2059592), (16, 1287245), (20, 1029796), (40, 514898), (80, 257449), (101, 203920), (202, 101960), (404, 50980), (505, 40784), (808, 25490), (1010, 20392), (1616, 12745), (2020, 10196), (2549, 8080), (4040, 5098)]