81487140

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{194017}}^1$

素因数の和:194036

約数の個数: 48

約数和(自身を含む): 260760192

約数和(自身を除く): 179273052

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 194017, 388034, 582051, 776068, 970085, 1164102, 1358119, 1940170, 2328204, 2716238, 2910255, 3880340, 4074357, 5432476, 5820510, 6790595, 8148714, 11641020, 13581190, 16297428, 20371785, 27162380, 40743570, 81487140]

約数ペア:

[(1, 81487140), (2, 40743570), (3, 27162380), (4, 20371785), (5, 16297428), (6, 13581190), (7, 11641020), (10, 8148714), (12, 6790595), (14, 5820510), (15, 5432476), (20, 4074357), (21, 3880340), (28, 2910255), (30, 2716238), (35, 2328204), (42, 1940170), (60, 1358119), (70, 1164102), (84, 970085), (105, 776068), (140, 582051), (210, 388034), (420, 194017)]