18988137

素因数分解:

$3^2\times 7^3\times {\mathrm{6151}}^1$

素因数の和:6178

約数の個数: 24

約数和(自身を含む): 31990400

約数和(自身を除く): 13002263

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 3087, 6151, 18453, 43057, 55359, 129171, 301399, 387513, 904197, 2109793, 2712591, 6329379, 18988137]

約数ペア:

[(1, 18988137), (3, 6329379), (7, 2712591), (9, 2109793), (21, 904197), (49, 387513), (63, 301399), (147, 129171), (343, 55359), (441, 43057), (1029, 18453), (3087, 6151)]