291263205807

素因数分解:

$3^4\times 7^1\times {\mathrm{513691721}}^1$

素因数の和:513691740

約数の個数: 20

約数和(自身を含む): 497253586896

約数和(自身を除く): 205990381089

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 513691721, 1541075163, 3595842047, 4623225489, 10787526141, 13869676467, 32362578423, 41609029401, 97087735269, 291263205807]

約数ペア:

[(1, 291263205807), (3, 97087735269), (7, 41609029401), (9, 32362578423), (21, 13869676467), (27, 10787526141), (63, 4623225489), (81, 3595842047), (189, 1541075163), (567, 513691721)]