20278456

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{233}}^1$

素因数の和:316

約数の個数: 64

約数和(自身を含む): 44478720

約数和(自身を除く): 24200264

約数列:

[1, 2, 4, 8, 11, 22, 23, 43, 44, 46, 86, 88, 92, 172, 184, 233, 253, 344, 466, 473, 506, 932, 946, 989, 1012, 1864, 1892, 1978, 2024, 2563, 3784, 3956, 5126, 5359, 7912, 10019, 10252, 10718, 10879, 20038, 20504, 21436, 21758, 40076, 42872, 43516, 58949, 80152, 87032, 110209, 117898, 220418, 230437, 235796, 440836, 460874, 471592, 881672, 921748, 1843496, 2534807, 5069614, 10139228, 20278456]

約数ペア:

[(1, 20278456), (2, 10139228), (4, 5069614), (8, 2534807), (11, 1843496), (22, 921748), (23, 881672), (43, 471592), (44, 460874), (46, 440836), (86, 235796), (88, 230437), (92, 220418), (172, 117898), (184, 110209), (233, 87032), (253, 80152), (344, 58949), (466, 43516), (473, 42872), (506, 40076), (932, 21758), (946, 21436), (989, 20504), (1012, 20038), (1864, 10879), (1892, 10718), (1978, 10252), (2024, 10019), (2563, 7912), (3784, 5359), (3956, 5126)]