19965426

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{359}}^1$

素因数の和:431

約数の個数: 64

約数和(自身を含む): 46448640

約数和(自身を除く): 26483214

約数列:

[1, 2, 3, 6, 13, 23, 26, 31, 39, 46, 62, 69, 78, 93, 138, 186, 299, 359, 403, 598, 713, 718, 806, 897, 1077, 1209, 1426, 1794, 2139, 2154, 2418, 4278, 4667, 8257, 9269, 9334, 11129, 14001, 16514, 18538, 22258, 24771, 27807, 28002, 33387, 49542, 55614, 66774, 107341, 144677, 214682, 255967, 289354, 322023, 434031, 511934, 644046, 767901, 868062, 1535802, 3327571, 6655142, 9982713, 19965426]

約数ペア:

[(1, 19965426), (2, 9982713), (3, 6655142), (6, 3327571), (13, 1535802), (23, 868062), (26, 767901), (31, 644046), (39, 511934), (46, 434031), (62, 322023), (69, 289354), (78, 255967), (93, 214682), (138, 144677), (186, 107341), (299, 66774), (359, 55614), (403, 49542), (598, 33387), (713, 28002), (718, 27807), (806, 24771), (897, 22258), (1077, 18538), (1209, 16514), (1426, 14001), (1794, 11129), (2139, 9334), (2154, 9269), (2418, 8257), (4278, 4667)]