21015824

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{947}}^1$

素因数の和:1047

約数の個数: 40

約数和(自身を含む): 43494240

約数和(自身を除く): 22478416

約数列:

[1, 2, 4, 8, 16, 19, 38, 73, 76, 146, 152, 292, 304, 584, 947, 1168, 1387, 1894, 2774, 3788, 5548, 7576, 11096, 15152, 17993, 22192, 35986, 69131, 71972, 138262, 143944, 276524, 287888, 553048, 1106096, 1313489, 2626978, 5253956, 10507912, 21015824]

約数ペア:

[(1, 21015824), (2, 10507912), (4, 5253956), (8, 2626978), (16, 1313489), (19, 1106096), (38, 553048), (73, 287888), (76, 276524), (146, 143944), (152, 138262), (292, 71972), (304, 69131), (584, 35986), (947, 22192), (1168, 17993), (1387, 15152), (1894, 11096), (2774, 7576), (3788, 5548)]