21286233

素因数分解:

$3^4\times {\mathrm{317}}^1\times {\mathrm{829}}^1$

素因数の和:1158

約数の個数: 20

約数和(自身を含む): 31936740

約数和(自身を除く): 10650507

約数列:

[1, 3, 9, 27, 81, 317, 829, 951, 2487, 2853, 7461, 8559, 22383, 25677, 67149, 262793, 788379, 2365137, 7095411, 21286233]

約数ペア:

[(1, 21286233), (3, 7095411), (9, 2365137), (27, 788379), (81, 262793), (317, 67149), (829, 25677), (951, 22383), (2487, 8559), (2853, 7461)]