8278840

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1489}}^1$

素因数の和:1639

約数の個数: 32

約数和(自身を含む): 18774000

約数和(自身を除く): 10495160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 1489, 2780, 2978, 5560, 5956, 7445, 11912, 14890, 29780, 59560, 206971, 413942, 827884, 1034855, 1655768, 2069710, 4139420, 8278840]

約数ペア:

[(1, 8278840), (2, 4139420), (4, 2069710), (5, 1655768), (8, 1034855), (10, 827884), (20, 413942), (40, 206971), (139, 59560), (278, 29780), (556, 14890), (695, 11912), (1112, 7445), (1390, 5956), (1489, 5560), (2780, 2978)]