639646845

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{647}}^1\times {\mathrm{3877}}^1$

素因数の和:4549

約数の個数: 32

約数和(自身を含む): 1085591808

約数和(自身を除く): 445944963

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 647, 1941, 3235, 3877, 9705, 10999, 11631, 19385, 32997, 54995, 58155, 65909, 164985, 197727, 329545, 988635, 2508419, 7525257, 12542095, 37626285, 42643123, 127929369, 213215615, 639646845]

約数ペア:

[(1, 639646845), (3, 213215615), (5, 127929369), (15, 42643123), (17, 37626285), (51, 12542095), (85, 7525257), (255, 2508419), (647, 988635), (1941, 329545), (3235, 197727), (3877, 164985), (9705, 65909), (10999, 58155), (11631, 54995), (19385, 32997)]