770721

素因数分解:

$3^1\times 7^4\times {\mathrm{107}}^1$

素因数の和:138

約数の個数: 20

約数和(自身を含む): 1210032

約数和(自身を除く): 439311

約数列:

[1, 3, 7, 21, 49, 107, 147, 321, 343, 749, 1029, 2247, 2401, 5243, 7203, 15729, 36701, 110103, 256907, 770721]

約数ペア:

[(1, 770721), (3, 256907), (7, 110103), (21, 36701), (49, 15729), (107, 7203), (147, 5243), (321, 2401), (343, 2247), (749, 1029)]