20213955

素因数分解:

$3^5\times 5^1\times {\mathrm{127}}^1\times {\mathrm{131}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 36900864

約数和(自身を除く): 16686909

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 127, 131, 135, 243, 381, 393, 405, 635, 655, 1143, 1179, 1215, 1905, 1965, 3429, 3537, 5715, 5895, 10287, 10611, 16637, 17145, 17685, 30861, 31833, 49911, 51435, 53055, 83185, 149733, 154305, 159165, 249555, 449199, 748665, 1347597, 2245995, 4042791, 6737985, 20213955]

約数ペア:

[(1, 20213955), (3, 6737985), (5, 4042791), (9, 2245995), (15, 1347597), (27, 748665), (45, 449199), (81, 249555), (127, 159165), (131, 154305), (135, 149733), (243, 83185), (381, 53055), (393, 51435), (405, 49911), (635, 31833), (655, 30861), (1143, 17685), (1179, 17145), (1215, 16637), (1905, 10611), (1965, 10287), (3429, 5895), (3537, 5715)]