81590420

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{39607}}^1$

素因数の和:39719

約数の個数: 24

約数和(自身を含む): 173007744

約数和(自身を除く): 91417324

約数列:

[1, 2, 4, 5, 10, 20, 103, 206, 412, 515, 1030, 2060, 39607, 79214, 158428, 198035, 396070, 792140, 4079521, 8159042, 16318084, 20397605, 40795210, 81590420]

約数ペア:

[(1, 81590420), (2, 40795210), (4, 20397605), (5, 16318084), (10, 8159042), (20, 4079521), (103, 792140), (206, 396070), (412, 198035), (515, 158428), (1030, 79214), (2060, 39607)]