20859559

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{991}}^1$

素因数の和:1126

約数の個数: 16

約数和(自身を含む): 24887296

約数和(自身を除く): 4027737

約数列:

[1, 7, 31, 97, 217, 679, 991, 3007, 6937, 21049, 30721, 96127, 215047, 672889, 2979937, 20859559]

約数ペア:

[(1, 20859559), (7, 2979937), (31, 672889), (97, 215047), (217, 96127), (679, 30721), (991, 21049), (3007, 6937)]