21604420

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{193}}^2$

素因数の和:424

約数の個数: 36

約数和(自身を含む): 47178180

約数和(自身を除く): 25573760

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 193, 290, 386, 580, 772, 965, 1930, 3860, 5597, 11194, 22388, 27985, 37249, 55970, 74498, 111940, 148996, 186245, 372490, 744980, 1080221, 2160442, 4320884, 5401105, 10802210, 21604420]

約数ペア:

[(1, 21604420), (2, 10802210), (4, 5401105), (5, 4320884), (10, 2160442), (20, 1080221), (29, 744980), (58, 372490), (116, 186245), (145, 148996), (193, 111940), (290, 74498), (386, 55970), (580, 37249), (772, 27985), (965, 22388), (1930, 11194), (3860, 5597)]