28774525

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 41247360

約数和(自身を除く): 12472835

約数列:

[1, 5, 13, 25, 29, 43, 65, 71, 145, 215, 325, 355, 377, 559, 725, 923, 1075, 1247, 1775, 1885, 2059, 2795, 3053, 4615, 6235, 9425, 10295, 13975, 15265, 16211, 23075, 26767, 31175, 39689, 51475, 76325, 81055, 88537, 133835, 198445, 405275, 442685, 669175, 992225, 1150981, 2213425, 5754905, 28774525]

約数ペア:

[(1, 28774525), (5, 5754905), (13, 2213425), (25, 1150981), (29, 992225), (43, 669175), (65, 442685), (71, 405275), (145, 198445), (215, 133835), (325, 88537), (355, 81055), (377, 76325), (559, 51475), (725, 39689), (923, 31175), (1075, 26767), (1247, 23075), (1775, 16211), (1885, 15265), (2059, 13975), (2795, 10295), (3053, 9425), (4615, 6235)]