20656420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{2861}}^1$

素因数の和:2908

約数の個数: 36

約数和(自身を含む): 45797724

約数和(自身を除く): 25141304

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 361, 380, 722, 1444, 1805, 2861, 3610, 5722, 7220, 11444, 14305, 28610, 54359, 57220, 108718, 217436, 271795, 543590, 1032821, 1087180, 2065642, 4131284, 5164105, 10328210, 20656420]

約数ペア:

[(1, 20656420), (2, 10328210), (4, 5164105), (5, 4131284), (10, 2065642), (19, 1087180), (20, 1032821), (38, 543590), (76, 271795), (95, 217436), (190, 108718), (361, 57220), (380, 54359), (722, 28610), (1444, 14305), (1805, 11444), (2861, 7220), (3610, 5722)]