21787899

素因数分解:

$3^1\times 7^2\times {\mathrm{103}}^1\times {\mathrm{1439}}^1$

素因数の和:1559

約数の個数: 24

約数和(自身を含む): 34145280

約数和(自身を除く): 12357381

約数列:

[1, 3, 7, 21, 49, 103, 147, 309, 721, 1439, 2163, 4317, 5047, 10073, 15141, 30219, 70511, 148217, 211533, 444651, 1037519, 3112557, 7262633, 21787899]

約数ペア:

[(1, 21787899), (3, 7262633), (7, 3112557), (21, 1037519), (49, 444651), (103, 211533), (147, 148217), (309, 70511), (721, 30219), (1439, 15141), (2163, 10073), (4317, 5047)]