21140707

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{619}}^1$

素因数の和:691

約数の個数: 24

約数和(自身を含む): 26717040

約数和(自身を除く): 5576333

約数列:

[1, 7, 17, 41, 49, 119, 287, 619, 697, 833, 2009, 4333, 4879, 10523, 25379, 30331, 34153, 73661, 177653, 431443, 515627, 1243571, 3020101, 21140707]

約数ペア:

[(1, 21140707), (7, 3020101), (17, 1243571), (41, 515627), (49, 431443), (119, 177653), (287, 73661), (619, 34153), (697, 30331), (833, 25379), (2009, 10523), (4333, 4879)]