20417761

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{241}}^1$

素因数の和:294

約数の個数: 32

約数和(自身を含む): 27104000

約数和(自身を除く): 6686239

約数列:

[1, 7, 13, 19, 49, 91, 133, 241, 247, 343, 637, 931, 1687, 1729, 3133, 4459, 4579, 6517, 11809, 12103, 21931, 32053, 59527, 82663, 84721, 153517, 224371, 416689, 1074619, 1570597, 2916823, 20417761]

約数ペア:

[(1, 20417761), (7, 2916823), (13, 1570597), (19, 1074619), (49, 416689), (91, 224371), (133, 153517), (241, 84721), (247, 82663), (343, 59527), (637, 32053), (931, 21931), (1687, 12103), (1729, 11809), (3133, 6517), (4459, 4579)]