20654480

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{479}}^1$

素因数の和:517

約数の個数: 120

約数和(自身を含む): 61067520

約数和(自身を除く): 40413040

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 80, 88, 98, 110, 112, 140, 154, 176, 196, 220, 245, 280, 308, 385, 392, 440, 479, 490, 539, 560, 616, 770, 784, 880, 958, 980, 1078, 1232, 1540, 1916, 1960, 2156, 2395, 2695, 3080, 3353, 3832, 3920, 4312, 4790, 5269, 5390, 6160, 6706, 7664, 8624, 9580, 10538, 10780, 13412, 16765, 19160, 21076, 21560, 23471, 26345, 26824, 33530, 36883, 38320, 42152, 43120, 46942, 52690, 53648, 67060, 73766, 84304, 93884, 105380, 117355, 134120, 147532, 184415, 187768, 210760, 234710, 258181, 268240, 295064, 368830, 375536, 421520, 469420, 516362, 590128, 737660, 938840, 1032724, 1290905, 1475320, 1877680, 2065448, 2581810, 2950640, 4130896, 5163620, 10327240, 20654480]

約数ペア:

[(1, 20654480), (2, 10327240), (4, 5163620), (5, 4130896), (7, 2950640), (8, 2581810), (10, 2065448), (11, 1877680), (14, 1475320), (16, 1290905), (20, 1032724), (22, 938840), (28, 737660), (35, 590128), (40, 516362), (44, 469420), (49, 421520), (55, 375536), (56, 368830), (70, 295064), (77, 268240), (80, 258181), (88, 234710), (98, 210760), (110, 187768), (112, 184415), (140, 147532), (154, 134120), (176, 117355), (196, 105380), (220, 93884), (245, 84304), (280, 73766), (308, 67060), (385, 53648), (392, 52690), (440, 46942), (479, 43120), (490, 42152), (539, 38320), (560, 36883), (616, 33530), (770, 26824), (784, 26345), (880, 23471), (958, 21560), (980, 21076), (1078, 19160), (1232, 16765), (1540, 13412), (1916, 10780), (1960, 10538), (2156, 9580), (2395, 8624), (2695, 7664), (3080, 6706), (3353, 6160), (3832, 5390), (3920, 5269), (4312, 4790)]