20015984

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{619}}^1$

素因数の和:717

約数の個数: 40

約数和(自身を含む): 40592640

約数和(自身を除く): 20576656

約数列:

[1, 2, 4, 8, 16, 43, 47, 86, 94, 172, 188, 344, 376, 619, 688, 752, 1238, 2021, 2476, 4042, 4952, 8084, 9904, 16168, 26617, 29093, 32336, 53234, 58186, 106468, 116372, 212936, 232744, 425872, 465488, 1250999, 2501998, 5003996, 10007992, 20015984]

約数ペア:

[(1, 20015984), (2, 10007992), (4, 5003996), (8, 2501998), (16, 1250999), (43, 465488), (47, 425872), (86, 232744), (94, 212936), (172, 116372), (188, 106468), (344, 58186), (376, 53234), (619, 32336), (688, 29093), (752, 26617), (1238, 16168), (2021, 9904), (2476, 8084), (4042, 4952)]