21939071

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{4013}}^1$

素因数の和:4102

約数の個数: 16

約数和(自身を含む): 27744768

約数和(自身を除く): 5805697

約数列:

[1, 7, 11, 71, 77, 497, 781, 4013, 5467, 28091, 44143, 284923, 309001, 1994461, 3134153, 21939071]

約数ペア:

[(1, 21939071), (7, 3134153), (11, 1994461), (71, 309001), (77, 284923), (497, 44143), (781, 28091), (4013, 5467)]