128561979

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{6451}}^1$

素因数の和:6547

約数の個数: 32

約数和(自身を含む): 213896704

約数和(自身を除く): 85334725

約数列:

[1, 3, 7, 13, 21, 39, 73, 91, 219, 273, 511, 949, 1533, 2847, 6451, 6643, 19353, 19929, 45157, 83863, 135471, 251589, 470923, 587041, 1412769, 1761123, 3296461, 6121999, 9889383, 18365997, 42853993, 128561979]

約数ペア:

[(1, 128561979), (3, 42853993), (7, 18365997), (13, 9889383), (21, 6121999), (39, 3296461), (73, 1761123), (91, 1412769), (219, 587041), (273, 470923), (511, 251589), (949, 135471), (1533, 83863), (2847, 45157), (6451, 19929), (6643, 19353)]