81115180

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{213461}}^1$

素因数の和:213489

約数の個数: 24

約数和(自身を含む): 179308080

約数和(自身を除く): 98192900

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 213461, 426922, 853844, 1067305, 2134610, 4055759, 4269220, 8111518, 16223036, 20278795, 40557590, 81115180]

約数ペア:

[(1, 81115180), (2, 40557590), (4, 20278795), (5, 16223036), (10, 8111518), (19, 4269220), (20, 4055759), (38, 2134610), (76, 1067305), (95, 853844), (190, 426922), (380, 213461)]