20407725

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{6977}}^1$

素因数の和:7006

約数の個数: 36

約数和(自身を含む): 39369876

約数和(自身を除く): 18962151

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 117, 195, 225, 325, 585, 975, 2925, 6977, 20931, 34885, 62793, 90701, 104655, 174425, 272103, 313965, 453505, 523275, 816309, 1360515, 1569825, 2267525, 4081545, 6802575, 20407725]

約数ペア:

[(1, 20407725), (3, 6802575), (5, 4081545), (9, 2267525), (13, 1569825), (15, 1360515), (25, 816309), (39, 523275), (45, 453505), (65, 313965), (75, 272103), (117, 174425), (195, 104655), (225, 90701), (325, 62793), (585, 34885), (975, 20931), (2925, 6977)]