209439657

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{54499}}^1$

素因数の和:54573

約数の個数: 24

約数和(自身を含む): 351416000

約数和(自身を除く): 141976343

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 54499, 163497, 381493, 490491, 1144479, 3324439, 3433437, 9973317, 23271073, 29919951, 69813219, 209439657]

約数ペア:

[(1, 209439657), (3, 69813219), (7, 29919951), (9, 23271073), (21, 9973317), (61, 3433437), (63, 3324439), (183, 1144479), (427, 490491), (549, 381493), (1281, 163497), (3843, 54499)]