21020461

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{661}}^1$

素因数の和:745

約数の個数: 24

約数和(自身を含む): 27168480

約数和(自身を除く): 6148019

約数列:

[1, 7, 11, 49, 59, 77, 413, 539, 649, 661, 2891, 4543, 4627, 7271, 31801, 32389, 38999, 50897, 272993, 356279, 428989, 1910951, 3002923, 21020461]

約数ペア:

[(1, 21020461), (7, 3002923), (11, 1910951), (49, 428989), (59, 356279), (77, 272993), (413, 50897), (539, 38999), (649, 32389), (661, 31801), (2891, 7271), (4543, 4627)]