20369680

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2521}}^1$

素因数の和:2635

約数の個数: 40

約数和(自身を含む): 47847384

約数和(自身を除く): 27477704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 2521, 4040, 5042, 8080, 10084, 12605, 20168, 25210, 40336, 50420, 100840, 201680, 254621, 509242, 1018484, 1273105, 2036968, 2546210, 4073936, 5092420, 10184840, 20369680]

約数ペア:

[(1, 20369680), (2, 10184840), (4, 5092420), (5, 4073936), (8, 2546210), (10, 2036968), (16, 1273105), (20, 1018484), (40, 509242), (80, 254621), (101, 201680), (202, 100840), (404, 50420), (505, 40336), (808, 25210), (1010, 20168), (1616, 12605), (2020, 10084), (2521, 8080), (4040, 5042)]