12991719

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:247

約数の個数: 32

約数和(自身を含む): 19554304

約数和(自身を除く): 6562585

約数列:

[1, 3, 13, 39, 43, 61, 127, 129, 183, 381, 559, 793, 1651, 1677, 2379, 2623, 4953, 5461, 7747, 7869, 16383, 23241, 34099, 70993, 100711, 102297, 212979, 302133, 333121, 999363, 4330573, 12991719]

約数ペア:

[(1, 12991719), (3, 4330573), (13, 999363), (39, 333121), (43, 302133), (61, 212979), (127, 102297), (129, 100711), (183, 70993), (381, 34099), (559, 23241), (793, 16383), (1651, 7869), (1677, 7747), (2379, 5461), (2623, 4953)]