206513979

素因数分解:

$3^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{17783}}^1$

素因数の和:17879

約数の個数: 24

約数和(自身を含む): 324380160

約数和(自身を除く): 117866181

約数列:

[1, 3, 7, 21, 49, 79, 147, 237, 553, 1659, 3871, 11613, 17783, 53349, 124481, 373443, 871367, 1404857, 2614101, 4214571, 9833999, 29501997, 68837993, 206513979]

約数ペア:

[(1, 206513979), (3, 68837993), (7, 29501997), (21, 9833999), (49, 4214571), (79, 2614101), (147, 1404857), (237, 871367), (553, 373443), (1659, 124481), (3871, 53349), (11613, 17783)]