20139400

素因数分解:

$2^3\times 5^2\times {\mathrm{101}}^1\times {\mathrm{997}}^1$

素因数の和:1114

約数の個数: 48

約数和(自身を含む): 47335140

約数和(自身を除く): 27195740

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 101, 200, 202, 404, 505, 808, 997, 1010, 1994, 2020, 2525, 3988, 4040, 4985, 5050, 7976, 9970, 10100, 19940, 20200, 24925, 39880, 49850, 99700, 100697, 199400, 201394, 402788, 503485, 805576, 1006970, 2013940, 2517425, 4027880, 5034850, 10069700, 20139400]

約数ペア:

[(1, 20139400), (2, 10069700), (4, 5034850), (5, 4027880), (8, 2517425), (10, 2013940), (20, 1006970), (25, 805576), (40, 503485), (50, 402788), (100, 201394), (101, 199400), (200, 100697), (202, 99700), (404, 49850), (505, 39880), (808, 24925), (997, 20200), (1010, 19940), (1994, 10100), (2020, 9970), (2525, 7976), (3988, 5050), (4040, 4985)]