31781386

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:227

約数の個数: 64

約数和(自身を含む): 62447616

約数和(自身を除く): 30666230

約数列:

[1, 2, 7, 13, 14, 26, 31, 43, 62, 86, 91, 131, 182, 217, 262, 301, 403, 434, 559, 602, 806, 917, 1118, 1333, 1703, 1834, 2666, 2821, 3406, 3913, 4061, 5633, 5642, 7826, 8122, 9331, 11266, 11921, 17329, 18662, 23842, 28427, 34658, 39431, 52793, 56854, 73229, 78862, 105586, 121303, 146458, 174623, 242606, 349246, 369551, 512603, 739102, 1025206, 1222361, 2270099, 2444722, 4540198, 15890693, 31781386]

約数ペア:

[(1, 31781386), (2, 15890693), (7, 4540198), (13, 2444722), (14, 2270099), (26, 1222361), (31, 1025206), (43, 739102), (62, 512603), (86, 369551), (91, 349246), (131, 242606), (182, 174623), (217, 146458), (262, 121303), (301, 105586), (403, 78862), (434, 73229), (559, 56854), (602, 52793), (806, 39431), (917, 34658), (1118, 28427), (1333, 23842), (1703, 18662), (1834, 17329), (2666, 11921), (2821, 11266), (3406, 9331), (3913, 8122), (4061, 7826), (5633, 5642)]