80945720

素因数分解:

$2^3\times 5^1\times {\mathrm{449}}^1\times {\mathrm{4507}}^1$

素因数の和:4967

約数の個数: 32

約数和(自身を含む): 182574000

約数和(自身を除く): 101628280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 449, 898, 1796, 2245, 3592, 4490, 4507, 8980, 9014, 17960, 18028, 22535, 36056, 45070, 90140, 180280, 2023643, 4047286, 8094572, 10118215, 16189144, 20236430, 40472860, 80945720]

約数ペア:

[(1, 80945720), (2, 40472860), (4, 20236430), (5, 16189144), (8, 10118215), (10, 8094572), (20, 4047286), (40, 2023643), (449, 180280), (898, 90140), (1796, 45070), (2245, 36056), (3592, 22535), (4490, 18028), (4507, 17960), (8980, 9014)]