20728578

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{293}}^1\times {\mathrm{907}}^1$

素因数の和:1218

約数の個数: 32

約数和(自身を含む): 44847936

約数和(自身を除く): 24119358

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 293, 586, 879, 907, 1758, 1814, 2721, 3809, 5442, 7618, 11427, 11791, 22854, 23582, 35373, 70746, 265751, 531502, 797253, 1594506, 3454763, 6909526, 10364289, 20728578]

約数ペア:

[(1, 20728578), (2, 10364289), (3, 6909526), (6, 3454763), (13, 1594506), (26, 797253), (39, 531502), (78, 265751), (293, 70746), (586, 35373), (879, 23582), (907, 22854), (1758, 11791), (1814, 11427), (2721, 7618), (3809, 5442)]