20875113

素因数分解:

$3^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{3217}}^1$

素因数の和:3333

約数の個数: 24

約数和(自身を含む): 34805888

約数和(自身を除く): 13930775

約数列:

[1, 3, 7, 9, 21, 63, 103, 309, 721, 927, 2163, 3217, 6489, 9651, 22519, 28953, 67557, 202671, 331351, 994053, 2319457, 2982159, 6958371, 20875113]

約数ペア:

[(1, 20875113), (3, 6958371), (7, 2982159), (9, 2319457), (21, 994053), (63, 331351), (103, 202671), (309, 67557), (721, 28953), (927, 22519), (2163, 9651), (3217, 6489)]