19868780

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{919}}^1$

素因数の和:998

約数の個数: 48

約数和(自身を含む): 44513280

約数和(自身を除く): 24644500

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 47, 92, 94, 115, 188, 230, 235, 460, 470, 919, 940, 1081, 1838, 2162, 3676, 4324, 4595, 5405, 9190, 10810, 18380, 21137, 21620, 42274, 43193, 84548, 86386, 105685, 172772, 211370, 215965, 422740, 431930, 863860, 993439, 1986878, 3973756, 4967195, 9934390, 19868780]

約数ペア:

[(1, 19868780), (2, 9934390), (4, 4967195), (5, 3973756), (10, 1986878), (20, 993439), (23, 863860), (46, 431930), (47, 422740), (92, 215965), (94, 211370), (115, 172772), (188, 105685), (230, 86386), (235, 84548), (460, 43193), (470, 42274), (919, 21620), (940, 21137), (1081, 18380), (1838, 10810), (2162, 9190), (3676, 5405), (4324, 4595)]