20697747

素因数分解:

$3^1\times 7^2\times {\mathrm{103}}^1\times {\mathrm{1367}}^1$

素因数の和:1487

約数の個数: 24

約数和(自身を含む): 32438016

約数和(自身を除く): 11740269

約数列:

[1, 3, 7, 21, 49, 103, 147, 309, 721, 1367, 2163, 4101, 5047, 9569, 15141, 28707, 66983, 140801, 200949, 422403, 985607, 2956821, 6899249, 20697747]

約数ペア:

[(1, 20697747), (3, 6899249), (7, 2956821), (21, 985607), (49, 422403), (103, 200949), (147, 140801), (309, 66983), (721, 28707), (1367, 15141), (2163, 9569), (4101, 5047)]