81261860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{213847}}^1$

素因数の和:213875

約数の個数: 24

約数和(自身を含む): 179632320

約数和(自身を除く): 98370460

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 213847, 427694, 855388, 1069235, 2138470, 4063093, 4276940, 8126186, 16252372, 20315465, 40630930, 81261860]

約数ペア:

[(1, 81261860), (2, 40630930), (4, 20315465), (5, 16252372), (10, 8126186), (19, 4276940), (20, 4063093), (38, 2138470), (76, 1069235), (95, 855388), (190, 427694), (380, 213847)]