209966589

素因数分解:

$3^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{23977}}^1$

素因数の和:24129

約数の個数: 24

約数和(自身を含む): 349119680

約数和(自身を除く): 139153091

約数列:

[1, 3, 7, 9, 21, 63, 139, 417, 973, 1251, 2919, 8757, 23977, 71931, 167839, 215793, 503517, 1510551, 3332803, 9998409, 23329621, 29995227, 69988863, 209966589]

約数ペア:

[(1, 209966589), (3, 69988863), (7, 29995227), (9, 23329621), (21, 9998409), (63, 3332803), (139, 1510551), (417, 503517), (973, 215793), (1251, 167839), (2919, 71931), (8757, 23977)]