20828360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1019}}^1$

素因数の和:1110

約数の個数: 64

約数和(自身を含む): 54345600

約数和(自身を除く): 33517240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 73, 140, 146, 280, 292, 365, 511, 584, 730, 1019, 1022, 1460, 2038, 2044, 2555, 2920, 4076, 4088, 5095, 5110, 7133, 8152, 10190, 10220, 14266, 20380, 20440, 28532, 35665, 40760, 57064, 71330, 74387, 142660, 148774, 285320, 297548, 371935, 520709, 595096, 743870, 1041418, 1487740, 2082836, 2603545, 2975480, 4165672, 5207090, 10414180, 20828360]

約数ペア:

[(1, 20828360), (2, 10414180), (4, 5207090), (5, 4165672), (7, 2975480), (8, 2603545), (10, 2082836), (14, 1487740), (20, 1041418), (28, 743870), (35, 595096), (40, 520709), (56, 371935), (70, 297548), (73, 285320), (140, 148774), (146, 142660), (280, 74387), (292, 71330), (365, 57064), (511, 40760), (584, 35665), (730, 28532), (1019, 20440), (1022, 20380), (1460, 14266), (2038, 10220), (2044, 10190), (2555, 8152), (2920, 7133), (4076, 5110), (4088, 5095)]