21381080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{4019}}^1$

素因数の和:4056

約数の個数: 64

約数和(自身を含む): 57888000

約数和(自身を除く): 36506920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 70, 76, 95, 133, 140, 152, 190, 266, 280, 380, 532, 665, 760, 1064, 1330, 2660, 4019, 5320, 8038, 16076, 20095, 28133, 32152, 40190, 56266, 76361, 80380, 112532, 140665, 152722, 160760, 225064, 281330, 305444, 381805, 534527, 562660, 610888, 763610, 1069054, 1125320, 1527220, 2138108, 2672635, 3054440, 4276216, 5345270, 10690540, 21381080]

約数ペア:

[(1, 21381080), (2, 10690540), (4, 5345270), (5, 4276216), (7, 3054440), (8, 2672635), (10, 2138108), (14, 1527220), (19, 1125320), (20, 1069054), (28, 763610), (35, 610888), (38, 562660), (40, 534527), (56, 381805), (70, 305444), (76, 281330), (95, 225064), (133, 160760), (140, 152722), (152, 140665), (190, 112532), (266, 80380), (280, 76361), (380, 56266), (532, 40190), (665, 32152), (760, 28133), (1064, 20095), (1330, 16076), (2660, 8038), (4019, 5320)]