81496840

素因数分解:

$2^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{11777}}^1$

素因数の和:11961

約数の個数: 32

約数和(自身を含む): 184443480

約数和(自身を除く): 102946640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 173, 346, 692, 865, 1384, 1730, 3460, 6920, 11777, 23554, 47108, 58885, 94216, 117770, 235540, 471080, 2037421, 4074842, 8149684, 10187105, 16299368, 20374210, 40748420, 81496840]

約数ペア:

[(1, 81496840), (2, 40748420), (4, 20374210), (5, 16299368), (8, 10187105), (10, 8149684), (20, 4074842), (40, 2037421), (173, 471080), (346, 235540), (692, 117770), (865, 94216), (1384, 58885), (1730, 47108), (3460, 23554), (6920, 11777)]