21742791

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{27983}}^1$

素因数の和:28030

約数の個数: 16

約数和(自身を含む): 34028544

約数和(自身を除く): 12285753

約数列:

[1, 3, 7, 21, 37, 111, 259, 777, 27983, 83949, 195881, 587643, 1035371, 3106113, 7247597, 21742791]

約数ペア:

[(1, 21742791), (3, 7247597), (7, 3106113), (21, 1035371), (37, 587643), (111, 195881), (259, 83949), (777, 27983)]