18996957

素因数分解:

$3^3\times 7^2\times {\mathrm{83}}^1\times {\mathrm{173}}^1$

素因数の和:279

約数の個数: 48

約数和(自身を含む): 33324480

約数和(自身を除く): 14327523

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 83, 147, 173, 189, 249, 441, 519, 581, 747, 1211, 1323, 1557, 1743, 2241, 3633, 4067, 4671, 5229, 8477, 10899, 12201, 14359, 15687, 25431, 32697, 36603, 43077, 76293, 100513, 109809, 129231, 228879, 301539, 387693, 703591, 904617, 2110773, 2713851, 6332319, 18996957]

約数ペア:

[(1, 18996957), (3, 6332319), (7, 2713851), (9, 2110773), (21, 904617), (27, 703591), (49, 387693), (63, 301539), (83, 228879), (147, 129231), (173, 109809), (189, 100513), (249, 76293), (441, 43077), (519, 36603), (581, 32697), (747, 25431), (1211, 15687), (1323, 14359), (1557, 12201), (1743, 10899), (2241, 8477), (3633, 5229), (4067, 4671)]