19936455

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{421}}^1$

素因数の和:488

約数の個数: 64

約数和(自身を含む): 40836096

約数和(自身を除く): 20899641

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 41, 55, 77, 105, 123, 165, 205, 231, 287, 385, 421, 451, 615, 861, 1155, 1263, 1353, 1435, 2105, 2255, 2947, 3157, 4305, 4631, 6315, 6765, 8841, 9471, 13893, 14735, 15785, 17261, 23155, 32417, 44205, 47355, 51783, 69465, 86305, 97251, 120827, 162085, 189871, 258915, 362481, 486255, 569613, 604135, 949355, 1329097, 1812405, 2848065, 3987291, 6645485, 19936455]

約数ペア:

[(1, 19936455), (3, 6645485), (5, 3987291), (7, 2848065), (11, 1812405), (15, 1329097), (21, 949355), (33, 604135), (35, 569613), (41, 486255), (55, 362481), (77, 258915), (105, 189871), (123, 162085), (165, 120827), (205, 97251), (231, 86305), (287, 69465), (385, 51783), (421, 47355), (451, 44205), (615, 32417), (861, 23155), (1155, 17261), (1263, 15785), (1353, 14735), (1435, 13893), (2105, 9471), (2255, 8841), (2947, 6765), (3157, 6315), (4305, 4631)]