21477080

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{6469}}^1$

素因数の和:6563

約数の個数: 32

約数和(自身を含む): 48913200

約数和(自身を除く): 27436120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 6469, 12938, 25876, 32345, 51752, 64690, 129380, 258760, 536927, 1073854, 2147708, 2684635, 4295416, 5369270, 10738540, 21477080]

約数ペア:

[(1, 21477080), (2, 10738540), (4, 5369270), (5, 4295416), (8, 2684635), (10, 2147708), (20, 1073854), (40, 536927), (83, 258760), (166, 129380), (332, 64690), (415, 51752), (664, 32345), (830, 25876), (1660, 12938), (3320, 6469)]