21190785

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{2621}}^1$

素因数の和:2654

約数の個数: 48

約数和(自身を含む): 43042752

約数和(自身を除く): 21851967

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 49, 55, 77, 105, 147, 165, 231, 245, 385, 539, 735, 1155, 1617, 2621, 2695, 7863, 8085, 13105, 18347, 28831, 39315, 55041, 86493, 91735, 128429, 144155, 201817, 275205, 385287, 432465, 605451, 642145, 1009085, 1412719, 1926435, 3027255, 4238157, 7063595, 21190785]

約数ペア:

[(1, 21190785), (3, 7063595), (5, 4238157), (7, 3027255), (11, 1926435), (15, 1412719), (21, 1009085), (33, 642145), (35, 605451), (49, 432465), (55, 385287), (77, 275205), (105, 201817), (147, 144155), (165, 128429), (231, 91735), (245, 86493), (385, 55041), (539, 39315), (735, 28831), (1155, 18347), (1617, 13105), (2621, 8085), (2695, 7863)]