18945220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{1033}}^1$

素因数の和:1180

約数の個数: 48

約数和(自身を含む): 45859968

約数和(自身を除く): 26914748

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 131, 140, 262, 524, 655, 917, 1033, 1310, 1834, 2066, 2620, 3668, 4132, 4585, 5165, 7231, 9170, 10330, 14462, 18340, 20660, 28924, 36155, 72310, 135323, 144620, 270646, 541292, 676615, 947261, 1353230, 1894522, 2706460, 3789044, 4736305, 9472610, 18945220]

約数ペア:

[(1, 18945220), (2, 9472610), (4, 4736305), (5, 3789044), (7, 2706460), (10, 1894522), (14, 1353230), (20, 947261), (28, 676615), (35, 541292), (70, 270646), (131, 144620), (140, 135323), (262, 72310), (524, 36155), (655, 28924), (917, 20660), (1033, 18340), (1310, 14462), (1834, 10330), (2066, 9170), (2620, 7231), (3668, 5165), (4132, 4585)]