21513520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{937}}^1$

素因数の和:998

約数の個数: 80

約数和(自身を含む): 58621248

約数和(自身を除く): 37107728

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 41, 56, 70, 80, 82, 112, 140, 164, 205, 280, 287, 328, 410, 560, 574, 656, 820, 937, 1148, 1435, 1640, 1874, 2296, 2870, 3280, 3748, 4592, 4685, 5740, 6559, 7496, 9370, 11480, 13118, 14992, 18740, 22960, 26236, 32795, 37480, 38417, 52472, 65590, 74960, 76834, 104944, 131180, 153668, 192085, 262360, 268919, 307336, 384170, 524720, 537838, 614672, 768340, 1075676, 1344595, 1536680, 2151352, 2689190, 3073360, 4302704, 5378380, 10756760, 21513520]

約数ペア:

[(1, 21513520), (2, 10756760), (4, 5378380), (5, 4302704), (7, 3073360), (8, 2689190), (10, 2151352), (14, 1536680), (16, 1344595), (20, 1075676), (28, 768340), (35, 614672), (40, 537838), (41, 524720), (56, 384170), (70, 307336), (80, 268919), (82, 262360), (112, 192085), (140, 153668), (164, 131180), (205, 104944), (280, 76834), (287, 74960), (328, 65590), (410, 52472), (560, 38417), (574, 37480), (656, 32795), (820, 26236), (937, 22960), (1148, 18740), (1435, 14992), (1640, 13118), (1874, 11480), (2296, 9370), (2870, 7496), (3280, 6559), (3748, 5740), (4592, 4685)]