21781320

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{569}}^1$

素因数の和:623

約数の個数: 128

約数和(自身を含む): 73872000

約数和(自身を除く): 52090680

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 29, 30, 33, 40, 44, 55, 58, 60, 66, 87, 88, 110, 116, 120, 132, 145, 165, 174, 220, 232, 264, 290, 319, 330, 348, 435, 440, 569, 580, 638, 660, 696, 870, 957, 1138, 1160, 1276, 1320, 1595, 1707, 1740, 1914, 2276, 2552, 2845, 3190, 3414, 3480, 3828, 4552, 4785, 5690, 6259, 6380, 6828, 7656, 8535, 9570, 11380, 12518, 12760, 13656, 16501, 17070, 18777, 19140, 22760, 25036, 31295, 33002, 34140, 37554, 38280, 49503, 50072, 62590, 66004, 68280, 75108, 82505, 93885, 99006, 125180, 132008, 150216, 165010, 181511, 187770, 198012, 247515, 250360, 330020, 363022, 375540, 396024, 495030, 544533, 660040, 726044, 751080, 907555, 990060, 1089066, 1452088, 1815110, 1980120, 2178132, 2722665, 3630220, 4356264, 5445330, 7260440, 10890660, 21781320]

約数ペア:

[(1, 21781320), (2, 10890660), (3, 7260440), (4, 5445330), (5, 4356264), (6, 3630220), (8, 2722665), (10, 2178132), (11, 1980120), (12, 1815110), (15, 1452088), (20, 1089066), (22, 990060), (24, 907555), (29, 751080), (30, 726044), (33, 660040), (40, 544533), (44, 495030), (55, 396024), (58, 375540), (60, 363022), (66, 330020), (87, 250360), (88, 247515), (110, 198012), (116, 187770), (120, 181511), (132, 165010), (145, 150216), (165, 132008), (174, 125180), (220, 99006), (232, 93885), (264, 82505), (290, 75108), (319, 68280), (330, 66004), (348, 62590), (435, 50072), (440, 49503), (569, 38280), (580, 37554), (638, 34140), (660, 33002), (696, 31295), (870, 25036), (957, 22760), (1138, 19140), (1160, 18777), (1276, 17070), (1320, 16501), (1595, 13656), (1707, 12760), (1740, 12518), (1914, 11380), (2276, 9570), (2552, 8535), (2845, 7656), (3190, 6828), (3414, 6380), (3480, 6259), (3828, 5690), (4552, 4785)]