640496840

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{842759}}^1$

素因数の和:842789

約数の個数: 32

約数和(自身を含む): 1516968000

約数和(自身を除く): 876471160

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 842759, 1685518, 3371036, 4213795, 6742072, 8427590, 16012421, 16855180, 32024842, 33710360, 64049684, 80062105, 128099368, 160124210, 320248420, 640496840]

約数ペア:

[(1, 640496840), (2, 320248420), (4, 160124210), (5, 128099368), (8, 80062105), (10, 64049684), (19, 33710360), (20, 32024842), (38, 16855180), (40, 16012421), (76, 8427590), (95, 6742072), (152, 4213795), (190, 3371036), (380, 1685518), (760, 842759)]