21218440

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{27919}}^1$

素因数の和:27949

約数の個数: 32

約数和(自身を含む): 50256000

約数和(自身を除く): 29037560

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 27919, 55838, 111676, 139595, 223352, 279190, 530461, 558380, 1060922, 1116760, 2121844, 2652305, 4243688, 5304610, 10609220, 21218440]

約数ペア:

[(1, 21218440), (2, 10609220), (4, 5304610), (5, 4243688), (8, 2652305), (10, 2121844), (19, 1116760), (20, 1060922), (38, 558380), (40, 530461), (76, 279190), (95, 223352), (152, 139595), (190, 111676), (380, 55838), (760, 27919)]