19647904

素因数分解:

$2^5\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1$

素因数の和:293

約数の個数: 48

約数和(自身を含む): 40249440

約数和(自身を除く): 20601536

約数列:

[1, 2, 4, 8, 16, 32, 43, 86, 109, 131, 172, 218, 262, 344, 436, 524, 688, 872, 1048, 1376, 1744, 2096, 3488, 4192, 4687, 5633, 9374, 11266, 14279, 18748, 22532, 28558, 37496, 45064, 57116, 74992, 90128, 114232, 149984, 180256, 228464, 456928, 613997, 1227994, 2455988, 4911976, 9823952, 19647904]

約数ペア:

[(1, 19647904), (2, 9823952), (4, 4911976), (8, 2455988), (16, 1227994), (32, 613997), (43, 456928), (86, 228464), (109, 180256), (131, 149984), (172, 114232), (218, 90128), (262, 74992), (344, 57116), (436, 45064), (524, 37496), (688, 28558), (872, 22532), (1048, 18748), (1376, 14279), (1744, 11266), (2096, 9374), (3488, 5633), (4192, 4687)]