21520323

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{97}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 35957376

約数和(自身を除く): 14437053

約数列:

[1, 3, 9, 11, 27, 33, 81, 83, 97, 99, 243, 249, 291, 297, 747, 873, 891, 913, 1067, 2241, 2619, 2673, 2739, 3201, 6723, 7857, 8051, 8217, 9603, 20169, 23571, 24153, 24651, 28809, 72459, 73953, 86427, 88561, 217377, 221859, 259281, 265683, 652131, 797049, 1956393, 2391147, 7173441, 21520323]

約数ペア:

[(1, 21520323), (3, 7173441), (9, 2391147), (11, 1956393), (27, 797049), (33, 652131), (81, 265683), (83, 259281), (97, 221859), (99, 217377), (243, 88561), (249, 86427), (291, 73953), (297, 72459), (747, 28809), (873, 24651), (891, 24153), (913, 23571), (1067, 20169), (2241, 9603), (2619, 8217), (2673, 8051), (2739, 7857), (3201, 6723)]