12991953

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{197}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 19958400

約数和(自身を除く): 6966447

約数列:

[1, 3, 13, 19, 39, 57, 89, 197, 247, 267, 591, 741, 1157, 1691, 2561, 3471, 3743, 5073, 7683, 11229, 17533, 21983, 48659, 52599, 65949, 145977, 227929, 333127, 683787, 999381, 4330651, 12991953]

約数ペア:

[(1, 12991953), (3, 4330651), (13, 999381), (19, 683787), (39, 333127), (57, 227929), (89, 145977), (197, 65949), (247, 52599), (267, 48659), (591, 21983), (741, 17533), (1157, 11229), (1691, 7683), (2561, 5073), (3471, 3743)]