720588729

素因数分解:

$3^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{271}}^1\times {\mathrm{997}}^1$

素因数の和:1405

約数の個数: 32

約数和(自身を含む): 1111883776

約数和(自身を除く): 391295047

約数列:

[1, 3, 7, 21, 127, 271, 381, 813, 889, 997, 1897, 2667, 2991, 5691, 6979, 20937, 34417, 103251, 126619, 240919, 270187, 379857, 722757, 810561, 886333, 1891309, 2658999, 5673927, 34313749, 102941247, 240196243, 720588729]

約数ペア:

[(1, 720588729), (3, 240196243), (7, 102941247), (21, 34313749), (127, 5673927), (271, 2658999), (381, 1891309), (813, 886333), (889, 810561), (997, 722757), (1897, 379857), (2667, 270187), (2991, 240919), (5691, 126619), (6979, 103251), (20937, 34417)]