20979952

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{9859}}^1$

素因数の和:9893

約数の個数: 40

約数和(自身を含む): 48905600

約数和(自身を除く): 27925648

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 56, 76, 112, 133, 152, 266, 304, 532, 1064, 2128, 9859, 19718, 39436, 69013, 78872, 138026, 157744, 187321, 276052, 374642, 552104, 749284, 1104208, 1311247, 1498568, 2622494, 2997136, 5244988, 10489976, 20979952]

約数ペア:

[(1, 20979952), (2, 10489976), (4, 5244988), (7, 2997136), (8, 2622494), (14, 1498568), (16, 1311247), (19, 1104208), (28, 749284), (38, 552104), (56, 374642), (76, 276052), (112, 187321), (133, 157744), (152, 138026), (266, 78872), (304, 69013), (532, 39436), (1064, 19718), (2128, 9859)]