21388544

素因数分解:

$2^8\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:155

約数の個数: 72

約数和(自身を含む): 45867360

約数和(自身を除く): 24478816

約数列:

[1, 2, 4, 8, 16, 29, 32, 43, 58, 64, 67, 86, 116, 128, 134, 172, 232, 256, 268, 344, 464, 536, 688, 928, 1072, 1247, 1376, 1856, 1943, 2144, 2494, 2752, 2881, 3712, 3886, 4288, 4988, 5504, 5762, 7424, 7772, 8576, 9976, 11008, 11524, 15544, 17152, 19952, 23048, 31088, 39904, 46096, 62176, 79808, 83549, 92192, 124352, 159616, 167098, 184384, 248704, 319232, 334196, 368768, 497408, 668392, 737536, 1336784, 2673568, 5347136, 10694272, 21388544]

約数ペア:

[(1, 21388544), (2, 10694272), (4, 5347136), (8, 2673568), (16, 1336784), (29, 737536), (32, 668392), (43, 497408), (58, 368768), (64, 334196), (67, 319232), (86, 248704), (116, 184384), (128, 167098), (134, 159616), (172, 124352), (232, 92192), (256, 83549), (268, 79808), (344, 62176), (464, 46096), (536, 39904), (688, 31088), (928, 23048), (1072, 19952), (1247, 17152), (1376, 15544), (1856, 11524), (1943, 11008), (2144, 9976), (2494, 8576), (2752, 7772), (2881, 7424), (3712, 5762), (3886, 5504), (4288, 4988)]