19984401

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{631}}^1$

素因数の和:683

約数の個数: 40

約数和(自身を含む): 33035904

約数和(自身を除く): 13051503

約数列:

[1, 3, 9, 17, 23, 27, 51, 69, 81, 153, 207, 391, 459, 621, 631, 1173, 1377, 1863, 1893, 3519, 5679, 10557, 10727, 14513, 17037, 31671, 32181, 43539, 51111, 96543, 130617, 246721, 289629, 391851, 740163, 868887, 1175553, 2220489, 6661467, 19984401]

約数ペア:

[(1, 19984401), (3, 6661467), (9, 2220489), (17, 1175553), (23, 868887), (27, 740163), (51, 391851), (69, 289629), (81, 246721), (153, 130617), (207, 96543), (391, 51111), (459, 43539), (621, 32181), (631, 31671), (1173, 17037), (1377, 14513), (1863, 10727), (1893, 10557), (3519, 5679)]