81661240

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{107449}}^1$

素因数の和:107479

約数の個数: 32

約数和(自身を含む): 193410000

約数和(自身を除く): 111748760

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 107449, 214898, 429796, 537245, 859592, 1074490, 2041531, 2148980, 4083062, 4297960, 8166124, 10207655, 16332248, 20415310, 40830620, 81661240]

約数ペア:

[(1, 81661240), (2, 40830620), (4, 20415310), (5, 16332248), (8, 10207655), (10, 8166124), (19, 4297960), (20, 4083062), (38, 2148980), (40, 2041531), (76, 1074490), (95, 859592), (152, 537245), (190, 429796), (380, 214898), (760, 107449)]