20415825

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{2927}}^1$

素因数の和:2974

約数の個数: 36

約数和(自身を含む): 37759488

約数和(自身を除く): 17343663

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 155, 225, 279, 465, 775, 1395, 2325, 2927, 6975, 8781, 14635, 26343, 43905, 73175, 90737, 131715, 219525, 272211, 453685, 658575, 816633, 1361055, 2268425, 4083165, 6805275, 20415825]

約数ペア:

[(1, 20415825), (3, 6805275), (5, 4083165), (9, 2268425), (15, 1361055), (25, 816633), (31, 658575), (45, 453685), (75, 272211), (93, 219525), (155, 131715), (225, 90737), (279, 73175), (465, 43905), (775, 26343), (1395, 14635), (2325, 8781), (2927, 6975)]