21490149147

素因数分解:

$3^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{991}}^1\times {\mathrm{1669}}^1$

素因数の和:2795

約数の個数: 32

約数和(自身を含む): 29580963840

約数和(自身を除く): 8090814693

約数列:

[1, 3, 61, 71, 183, 213, 991, 1669, 2973, 4331, 5007, 12993, 60451, 70361, 101809, 118499, 181353, 211083, 305427, 355497, 1653979, 4292021, 4961937, 7228439, 12876063, 21685317, 100892719, 117432509, 302678157, 352297527, 7163383049, 21490149147]

約数ペア:

[(1, 21490149147), (3, 7163383049), (61, 352297527), (71, 302678157), (183, 117432509), (213, 100892719), (991, 21685317), (1669, 12876063), (2973, 7228439), (4331, 4961937), (5007, 4292021), (12993, 1653979), (60451, 355497), (70361, 305427), (101809, 211083), (118499, 181353)]