20706640

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{107}}^1$

素因数の和:220

約数の個数: 80

約数和(自身を含む): 50621760

約数和(自身を除く): 29915120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 59, 80, 82, 107, 118, 164, 205, 214, 236, 295, 328, 410, 428, 472, 535, 590, 656, 820, 856, 944, 1070, 1180, 1640, 1712, 2140, 2360, 2419, 3280, 4280, 4387, 4720, 4838, 6313, 8560, 8774, 9676, 12095, 12626, 17548, 19352, 21935, 24190, 25252, 31565, 35096, 38704, 43870, 48380, 50504, 63130, 70192, 87740, 96760, 101008, 126260, 175480, 193520, 252520, 258833, 350960, 505040, 517666, 1035332, 1294165, 2070664, 2588330, 4141328, 5176660, 10353320, 20706640]

約数ペア:

[(1, 20706640), (2, 10353320), (4, 5176660), (5, 4141328), (8, 2588330), (10, 2070664), (16, 1294165), (20, 1035332), (40, 517666), (41, 505040), (59, 350960), (80, 258833), (82, 252520), (107, 193520), (118, 175480), (164, 126260), (205, 101008), (214, 96760), (236, 87740), (295, 70192), (328, 63130), (410, 50504), (428, 48380), (472, 43870), (535, 38704), (590, 35096), (656, 31565), (820, 25252), (856, 24190), (944, 21935), (1070, 19352), (1180, 17548), (1640, 12626), (1712, 12095), (2140, 9676), (2360, 8774), (2419, 8560), (3280, 6313), (4280, 4838), (4387, 4720)]