20309991

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{157}}^1$

素因数の和:311

約数の個数: 32

約数和(自身を含む): 30578688

約数和(自身を除く): 10268697

約数列:

[1, 3, 13, 31, 39, 93, 107, 157, 321, 403, 471, 1209, 1391, 2041, 3317, 4173, 4867, 6123, 9951, 14601, 16799, 43121, 50397, 63271, 129363, 189813, 218387, 520769, 655161, 1562307, 6769997, 20309991]

約数ペア:

[(1, 20309991), (3, 6769997), (13, 1562307), (31, 655161), (39, 520769), (93, 218387), (107, 189813), (157, 129363), (321, 63271), (403, 50397), (471, 43121), (1209, 16799), (1391, 14601), (2041, 9951), (3317, 6123), (4173, 4867)]