20983207

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1\times {\mathrm{313}}^1$

素因数の和:538

約数の個数: 16

約数和(自身を含む): 24607552

約数和(自身を除く): 3624345

約数列:

[1, 7, 61, 157, 313, 427, 1099, 2191, 9577, 19093, 49141, 67039, 133651, 343987, 2997601, 20983207]

約数ペア:

[(1, 20983207), (7, 2997601), (61, 343987), (157, 133651), (313, 67039), (427, 49141), (1099, 19093), (2191, 9577)]