20956905

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{193}}^1$

素因数の和:350

約数の個数: 48

約数和(自身を含む): 38737920

約数和(自身を除く): 17781015

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 127, 171, 193, 285, 381, 579, 635, 855, 965, 1143, 1737, 1905, 2413, 2895, 3667, 5715, 7239, 8685, 11001, 12065, 18335, 21717, 24511, 33003, 36195, 55005, 73533, 108585, 122555, 165015, 220599, 367665, 465709, 1102995, 1397127, 2328545, 4191381, 6985635, 20956905]

約数ペア:

[(1, 20956905), (3, 6985635), (5, 4191381), (9, 2328545), (15, 1397127), (19, 1102995), (45, 465709), (57, 367665), (95, 220599), (127, 165015), (171, 122555), (193, 108585), (285, 73533), (381, 55005), (579, 36195), (635, 33003), (855, 24511), (965, 21717), (1143, 18335), (1737, 12065), (1905, 11001), (2413, 8685), (2895, 7239), (3667, 5715)]