19086980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{859}}^1$

素因数の和:980

約数の個数: 48

約数和(自身を含む): 44210880

約数和(自身を除く): 25123900

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 101, 110, 202, 220, 404, 505, 859, 1010, 1111, 1718, 2020, 2222, 3436, 4295, 4444, 5555, 8590, 9449, 11110, 17180, 18898, 22220, 37796, 47245, 86759, 94490, 173518, 188980, 347036, 433795, 867590, 954349, 1735180, 1908698, 3817396, 4771745, 9543490, 19086980]

約数ペア:

[(1, 19086980), (2, 9543490), (4, 4771745), (5, 3817396), (10, 1908698), (11, 1735180), (20, 954349), (22, 867590), (44, 433795), (55, 347036), (101, 188980), (110, 173518), (202, 94490), (220, 86759), (404, 47245), (505, 37796), (859, 22220), (1010, 18898), (1111, 17180), (1718, 11110), (2020, 9449), (2222, 8590), (3436, 5555), (4295, 4444)]