81205520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8389}}^1$

素因数の和:8424

約数の個数: 60

約数和(自身を含む): 207551820

約数和(自身を除く): 126346300

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 121, 176, 220, 242, 440, 484, 605, 880, 968, 1210, 1936, 2420, 4840, 8389, 9680, 16778, 33556, 41945, 67112, 83890, 92279, 134224, 167780, 184558, 335560, 369116, 461395, 671120, 738232, 922790, 1015069, 1476464, 1845580, 2030138, 3691160, 4060276, 5075345, 7382320, 8120552, 10150690, 16241104, 20301380, 40602760, 81205520]

約数ペア:

[(1, 81205520), (2, 40602760), (4, 20301380), (5, 16241104), (8, 10150690), (10, 8120552), (11, 7382320), (16, 5075345), (20, 4060276), (22, 3691160), (40, 2030138), (44, 1845580), (55, 1476464), (80, 1015069), (88, 922790), (110, 738232), (121, 671120), (176, 461395), (220, 369116), (242, 335560), (440, 184558), (484, 167780), (605, 134224), (880, 92279), (968, 83890), (1210, 67112), (1936, 41945), (2420, 33556), (4840, 16778), (8389, 9680)]