21478407937

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{220919}}^1$

素因数の和:221005

約数の個数: 32

約数和(自身を含む): 27994982400

約数和(自身を除く): 6516574463

約数列:

[1, 7, 17, 19, 43, 119, 133, 301, 323, 731, 817, 2261, 5117, 5719, 13889, 97223, 220919, 1546433, 3755623, 4197461, 9499517, 26289361, 29382227, 66496619, 71356837, 161491789, 180490823, 499497859, 1130442523, 1263435761, 3068343991, 21478407937]

約数ペア:

[(1, 21478407937), (7, 3068343991), (17, 1263435761), (19, 1130442523), (43, 499497859), (119, 180490823), (133, 161491789), (301, 71356837), (323, 66496619), (731, 29382227), (817, 26289361), (2261, 9499517), (5117, 4197461), (5719, 3755623), (13889, 1546433), (97223, 220919)]