20865325

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1$

素因数の和:182

約数の個数: 48

約数和(自身を含む): 30553600

約数和(自身を除く): 9688275

約数列:

[1, 5, 13, 19, 25, 31, 65, 95, 109, 155, 247, 325, 403, 475, 545, 589, 775, 1235, 1417, 2015, 2071, 2725, 2945, 3379, 6175, 7085, 7657, 10075, 10355, 14725, 16895, 26923, 35425, 38285, 43927, 51775, 64201, 84475, 134615, 191425, 219635, 321005, 673075, 834613, 1098175, 1605025, 4173065, 20865325]

約数ペア:

[(1, 20865325), (5, 4173065), (13, 1605025), (19, 1098175), (25, 834613), (31, 673075), (65, 321005), (95, 219635), (109, 191425), (155, 134615), (247, 84475), (325, 64201), (403, 51775), (475, 43927), (545, 38285), (589, 35425), (775, 26923), (1235, 16895), (1417, 14725), (2015, 10355), (2071, 10075), (2725, 7657), (2945, 7085), (3379, 6175)]