19811487

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1$

素因数の和:263

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 9218913

約数列:

[1, 3, 23, 41, 47, 69, 123, 141, 149, 447, 943, 1081, 1927, 2829, 3243, 3427, 5781, 6109, 7003, 10281, 18327, 21009, 44321, 132963, 140507, 161069, 287123, 421521, 483207, 861369, 6603829, 19811487]

約数ペア:

[(1, 19811487), (3, 6603829), (23, 861369), (41, 483207), (47, 421521), (69, 287123), (123, 161069), (141, 140507), (149, 132963), (447, 44321), (943, 21009), (1081, 18327), (1927, 10281), (2829, 7003), (3243, 6109), (3427, 5781)]