20347240

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:274

約数の個数: 64

約数和(自身を含む): 47692800

約数和(自身を除く): 27345560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 79, 94, 137, 158, 188, 235, 274, 316, 376, 395, 470, 548, 632, 685, 790, 940, 1096, 1370, 1580, 1880, 2740, 3160, 3713, 5480, 6439, 7426, 10823, 12878, 14852, 18565, 21646, 25756, 29704, 32195, 37130, 43292, 51512, 54115, 64390, 74260, 86584, 108230, 128780, 148520, 216460, 257560, 432920, 508681, 1017362, 2034724, 2543405, 4069448, 5086810, 10173620, 20347240]

約数ペア:

[(1, 20347240), (2, 10173620), (4, 5086810), (5, 4069448), (8, 2543405), (10, 2034724), (20, 1017362), (40, 508681), (47, 432920), (79, 257560), (94, 216460), (137, 148520), (158, 128780), (188, 108230), (235, 86584), (274, 74260), (316, 64390), (376, 54115), (395, 51512), (470, 43292), (548, 37130), (632, 32195), (685, 29704), (790, 25756), (940, 21646), (1096, 18565), (1370, 14852), (1580, 12878), (1880, 10823), (2740, 7426), (3160, 6439), (3713, 5480)]