19689723

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{181}}^1$

素因数の和:289

約数の個数: 40

約数和(自身を含む): 31711680

約数和(自身を除く): 12021957

約数列:

[1, 3, 9, 17, 27, 51, 79, 81, 153, 181, 237, 459, 543, 711, 1343, 1377, 1629, 2133, 3077, 4029, 4887, 6399, 9231, 12087, 14299, 14661, 27693, 36261, 42897, 83079, 108783, 128691, 243083, 249237, 386073, 729249, 1158219, 2187747, 6563241, 19689723]

約数ペア:

[(1, 19689723), (3, 6563241), (9, 2187747), (17, 1158219), (27, 729249), (51, 386073), (79, 249237), (81, 243083), (153, 128691), (181, 108783), (237, 83079), (459, 42897), (543, 36261), (711, 27693), (1343, 14661), (1377, 14299), (1629, 12087), (2133, 9231), (3077, 6399), (4029, 4887)]