21947888

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:166

約数の個数: 80

約数和(自身を含む): 48449280

約数和(自身を除く): 26501392

約数列:

[1, 2, 4, 8, 16, 19, 23, 38, 43, 46, 73, 76, 86, 92, 146, 152, 172, 184, 292, 304, 344, 368, 437, 584, 688, 817, 874, 989, 1168, 1387, 1634, 1679, 1748, 1978, 2774, 3139, 3268, 3358, 3496, 3956, 5548, 6278, 6536, 6716, 6992, 7912, 11096, 12556, 13072, 13432, 15824, 18791, 22192, 25112, 26864, 31901, 37582, 50224, 59641, 63802, 72197, 75164, 119282, 127604, 144394, 150328, 238564, 255208, 288788, 300656, 477128, 510416, 577576, 954256, 1155152, 1371743, 2743486, 5486972, 10973944, 21947888]

約数ペア:

[(1, 21947888), (2, 10973944), (4, 5486972), (8, 2743486), (16, 1371743), (19, 1155152), (23, 954256), (38, 577576), (43, 510416), (46, 477128), (73, 300656), (76, 288788), (86, 255208), (92, 238564), (146, 150328), (152, 144394), (172, 127604), (184, 119282), (292, 75164), (304, 72197), (344, 63802), (368, 59641), (437, 50224), (584, 37582), (688, 31901), (817, 26864), (874, 25112), (989, 22192), (1168, 18791), (1387, 15824), (1634, 13432), (1679, 13072), (1748, 12556), (1978, 11096), (2774, 7912), (3139, 6992), (3268, 6716), (3358, 6536), (3496, 6278), (3956, 5548)]