7997780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{8161}}^1$

素因数の和:8184

約数の個数: 36

約数和(自身を含む): 19539828

約数和(自身を除く): 11542048

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 8161, 16322, 32644, 40805, 57127, 81610, 114254, 163220, 228508, 285635, 399889, 571270, 799778, 1142540, 1599556, 1999445, 3998890, 7997780]

約数ペア:

[(1, 7997780), (2, 3998890), (4, 1999445), (5, 1599556), (7, 1142540), (10, 799778), (14, 571270), (20, 399889), (28, 285635), (35, 228508), (49, 163220), (70, 114254), (98, 81610), (140, 57127), (196, 40805), (245, 32644), (490, 16322), (980, 8161)]