19715969

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{241}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 26019840

約数和(自身を除く): 6303871

約数列:

[1, 7, 13, 29, 31, 91, 203, 217, 241, 377, 403, 899, 1687, 2639, 2821, 3133, 6293, 6989, 7471, 11687, 21931, 48923, 52297, 81809, 90857, 97123, 216659, 635999, 679861, 1516613, 2816567, 19715969]

約数ペア:

[(1, 19715969), (7, 2816567), (13, 1516613), (29, 679861), (31, 635999), (91, 216659), (203, 97123), (217, 90857), (241, 81809), (377, 52297), (403, 48923), (899, 21931), (1687, 11687), (2639, 7471), (2821, 6989), (3133, 6293)]