19974040

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{257}}^1$

素因数の和:364

約数の個数: 64

約数和(自身を含む): 47368800

約数和(自身を除く): 27394760

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 67, 116, 134, 145, 232, 257, 268, 290, 335, 514, 536, 580, 670, 1028, 1160, 1285, 1340, 1943, 2056, 2570, 2680, 3886, 5140, 7453, 7772, 9715, 10280, 14906, 15544, 17219, 19430, 29812, 34438, 37265, 38860, 59624, 68876, 74530, 77720, 86095, 137752, 149060, 172190, 298120, 344380, 499351, 688760, 998702, 1997404, 2496755, 3994808, 4993510, 9987020, 19974040]

約数ペア:

[(1, 19974040), (2, 9987020), (4, 4993510), (5, 3994808), (8, 2496755), (10, 1997404), (20, 998702), (29, 688760), (40, 499351), (58, 344380), (67, 298120), (116, 172190), (134, 149060), (145, 137752), (232, 86095), (257, 77720), (268, 74530), (290, 68876), (335, 59624), (514, 38860), (536, 37265), (580, 34438), (670, 29812), (1028, 19430), (1160, 17219), (1285, 15544), (1340, 14906), (1943, 10280), (2056, 9715), (2570, 7772), (2680, 7453), (3886, 5140)]