21784959

素因数分解:

$3^2\times 7^3\times {\mathrm{7057}}^1$

素因数の和:7084

約数の個数: 24

約数和(自身を含む): 36701600

約数和(自身を除く): 14916641

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 3087, 7057, 21171, 49399, 63513, 148197, 345793, 444591, 1037379, 2420551, 3112137, 7261653, 21784959]

約数ペア:

[(1, 21784959), (3, 7261653), (7, 3112137), (9, 2420551), (21, 1037379), (49, 444591), (63, 345793), (147, 148197), (343, 63513), (441, 49399), (1029, 21171), (3087, 7057)]