20215465

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{139}}^1$

素因数の和:249

約数の個数: 32

約数和(自身を含む): 27216000

約数和(自身を除く): 7000535

約数列:

[1, 5, 17, 29, 59, 85, 139, 145, 295, 493, 695, 1003, 1711, 2363, 2465, 4031, 5015, 8201, 8555, 11815, 20155, 29087, 41005, 68527, 139417, 145435, 237829, 342635, 697085, 1189145, 4043093, 20215465]

約数ペア:

[(1, 20215465), (5, 4043093), (17, 1189145), (29, 697085), (59, 342635), (85, 237829), (139, 145435), (145, 139417), (295, 68527), (493, 41005), (695, 29087), (1003, 20155), (1711, 11815), (2363, 8555), (2465, 8201), (4031, 5015)]