21020120

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:177

約数の個数: 96

約数和(自身を含む): 53721360

約数和(自身を除く): 32701240

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 101, 110, 121, 172, 202, 215, 220, 242, 344, 404, 430, 440, 473, 484, 505, 605, 808, 860, 946, 968, 1010, 1111, 1210, 1720, 1892, 2020, 2222, 2365, 2420, 3784, 4040, 4343, 4444, 4730, 4840, 5203, 5555, 8686, 8888, 9460, 10406, 11110, 12221, 17372, 18920, 20812, 21715, 22220, 24442, 26015, 34744, 41624, 43430, 44440, 47773, 48884, 52030, 61105, 86860, 95546, 97768, 104060, 122210, 173720, 191092, 208120, 238865, 244420, 382184, 477730, 488840, 525503, 955460, 1051006, 1910920, 2102012, 2627515, 4204024, 5255030, 10510060, 21020120]

約数ペア:

[(1, 21020120), (2, 10510060), (4, 5255030), (5, 4204024), (8, 2627515), (10, 2102012), (11, 1910920), (20, 1051006), (22, 955460), (40, 525503), (43, 488840), (44, 477730), (55, 382184), (86, 244420), (88, 238865), (101, 208120), (110, 191092), (121, 173720), (172, 122210), (202, 104060), (215, 97768), (220, 95546), (242, 86860), (344, 61105), (404, 52030), (430, 48884), (440, 47773), (473, 44440), (484, 43430), (505, 41624), (605, 34744), (808, 26015), (860, 24442), (946, 22220), (968, 21715), (1010, 20812), (1111, 18920), (1210, 17372), (1720, 12221), (1892, 11110), (2020, 10406), (2222, 9460), (2365, 8888), (2420, 8686), (3784, 5555), (4040, 5203), (4343, 4840), (4444, 4730)]