81151660

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{213557}}^1$

素因数の和:213585

約数の個数: 24

約数和(自身を含む): 179388720

約数和(自身を除く): 98237060

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 213557, 427114, 854228, 1067785, 2135570, 4057583, 4271140, 8115166, 16230332, 20287915, 40575830, 81151660]

約数ペア:

[(1, 81151660), (2, 40575830), (4, 20287915), (5, 16230332), (10, 8115166), (19, 4271140), (20, 4057583), (38, 2135570), (76, 1067785), (95, 854228), (190, 427114), (380, 213557)]