20801680

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6047}}^1$

素因数の和:6103

約数の個数: 40

約数和(自身を含む): 49496832

約数和(自身を除く): 28695152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 6047, 12094, 24188, 30235, 48376, 60470, 96752, 120940, 241880, 260021, 483760, 520042, 1040084, 1300105, 2080168, 2600210, 4160336, 5200420, 10400840, 20801680]

約数ペア:

[(1, 20801680), (2, 10400840), (4, 5200420), (5, 4160336), (8, 2600210), (10, 2080168), (16, 1300105), (20, 1040084), (40, 520042), (43, 483760), (80, 260021), (86, 241880), (172, 120940), (215, 96752), (344, 60470), (430, 48376), (688, 30235), (860, 24188), (1720, 12094), (3440, 6047)]