18983984

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{673}}^1$

素因数の和:765

約数の個数: 40

約数和(自身を含む): 38612112

約数和(自身を除く): 19628128

約数列:

[1, 2, 4, 8, 16, 41, 43, 82, 86, 164, 172, 328, 344, 656, 673, 688, 1346, 1763, 2692, 3526, 5384, 7052, 10768, 14104, 27593, 28208, 28939, 55186, 57878, 110372, 115756, 220744, 231512, 441488, 463024, 1186499, 2372998, 4745996, 9491992, 18983984]

約数ペア:

[(1, 18983984), (2, 9491992), (4, 4745996), (8, 2372998), (16, 1186499), (41, 463024), (43, 441488), (82, 231512), (86, 220744), (164, 115756), (172, 110372), (328, 57878), (344, 55186), (656, 28939), (673, 28208), (688, 27593), (1346, 14104), (1763, 10768), (2692, 7052), (3526, 5384)]