20781054

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{1259}}^1$

素因数の和:1405

約数の個数: 48

約数和(自身を含む): 51891840

約数和(自身を除く): 31110786

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 131, 262, 393, 786, 917, 1179, 1259, 1834, 2358, 2518, 2751, 3777, 5502, 7554, 8253, 8813, 11331, 16506, 17626, 22662, 26439, 52878, 79317, 158634, 164929, 329858, 494787, 989574, 1154503, 1484361, 2309006, 2968722, 3463509, 6927018, 10390527, 20781054]

約数ペア:

[(1, 20781054), (2, 10390527), (3, 6927018), (6, 3463509), (7, 2968722), (9, 2309006), (14, 1484361), (18, 1154503), (21, 989574), (42, 494787), (63, 329858), (126, 164929), (131, 158634), (262, 79317), (393, 52878), (786, 26439), (917, 22662), (1179, 17626), (1259, 16506), (1834, 11331), (2358, 8813), (2518, 8253), (2751, 7554), (3777, 5502)]