19663021

素因数分解:

$7^1\times {\mathrm{31}}^2\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:185

約数の個数: 24

約数和(自身を含む): 24149760

約数和(自身を除く): 4486739

約数列:

[1, 7, 31, 37, 79, 217, 259, 553, 961, 1147, 2449, 2923, 6727, 8029, 17143, 20461, 35557, 75919, 90613, 248899, 531433, 634291, 2809003, 19663021]

約数ペア:

[(1, 19663021), (7, 2809003), (31, 634291), (37, 531433), (79, 248899), (217, 90613), (259, 75919), (553, 35557), (961, 20461), (1147, 17143), (2449, 8029), (2923, 6727)]