28421575

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{31}}^2$

素因数の和:105

約数の個数: 54

約数和(自身を含む): 45066312

約数和(自身を除く): 16644737

約数列:

[1, 5, 7, 13, 25, 31, 35, 65, 91, 155, 169, 175, 217, 325, 403, 455, 775, 845, 961, 1085, 1183, 2015, 2275, 2821, 4225, 4805, 5239, 5425, 5915, 6727, 10075, 12493, 14105, 24025, 26195, 29575, 33635, 36673, 62465, 70525, 87451, 130975, 162409, 168175, 183365, 312325, 437255, 812045, 916825, 1136863, 2186275, 4060225, 5684315, 28421575]

約数ペア:

[(1, 28421575), (5, 5684315), (7, 4060225), (13, 2186275), (25, 1136863), (31, 916825), (35, 812045), (65, 437255), (91, 312325), (155, 183365), (169, 168175), (175, 162409), (217, 130975), (325, 87451), (403, 70525), (455, 62465), (775, 36673), (845, 33635), (961, 29575), (1085, 26195), (1183, 24025), (2015, 14105), (2275, 12493), (2821, 10075), (4225, 6727), (4805, 5915), (5239, 5425)]