20904261

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1\times {\mathrm{197}}^1$

素因数の和:401

約数の個数: 32

約数和(自身を含む): 33251328

約数和(自身を除く): 12347067

約数列:

[1, 3, 7, 21, 31, 93, 163, 197, 217, 489, 591, 651, 1141, 1379, 3423, 4137, 5053, 6107, 15159, 18321, 32111, 35371, 42749, 96333, 106113, 128247, 224777, 674331, 995441, 2986323, 6968087, 20904261]

約数ペア:

[(1, 20904261), (3, 6968087), (7, 2986323), (21, 995441), (31, 674331), (93, 224777), (163, 128247), (197, 106113), (217, 96333), (489, 42749), (591, 35371), (651, 32111), (1141, 18321), (1379, 15159), (3423, 6107), (4137, 5053)]