21427231

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{5197}}^1$

素因数の和:5254

約数の個数: 16

約数和(自身を含む): 26613760

約数和(自身を除く): 5186529

約数列:

[1, 7, 19, 31, 133, 217, 589, 4123, 5197, 36379, 98743, 161107, 691201, 1127749, 3061033, 21427231]

約数ペア:

[(1, 21427231), (7, 3061033), (19, 1127749), (31, 691201), (133, 161107), (217, 98743), (589, 36379), (4123, 5197)]