551498180

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{20441}}^1$

素因数の和:20540

約数の個数: 48

約数和(自身を含む): 1236332160

約数和(自身を除く): 684833980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 71, 76, 95, 142, 190, 284, 355, 380, 710, 1349, 1420, 2698, 5396, 6745, 13490, 20441, 26980, 40882, 81764, 102205, 204410, 388379, 408820, 776758, 1451311, 1553516, 1941895, 2902622, 3883790, 5805244, 7256555, 7767580, 14513110, 27574909, 29026220, 55149818, 110299636, 137874545, 275749090, 551498180]

約数ペア:

[(1, 551498180), (2, 275749090), (4, 137874545), (5, 110299636), (10, 55149818), (19, 29026220), (20, 27574909), (38, 14513110), (71, 7767580), (76, 7256555), (95, 5805244), (142, 3883790), (190, 2902622), (284, 1941895), (355, 1553516), (380, 1451311), (710, 776758), (1349, 408820), (1420, 388379), (2698, 204410), (5396, 102205), (6745, 81764), (13490, 40882), (20441, 26980)]