21793805

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{5581}}^1$

素因数の和:5668

約数の個数: 16

約数和(自身を含む): 28937088

約数和(自身を除く): 7143283

約数列:

[1, 5, 11, 55, 71, 355, 781, 3905, 5581, 27905, 61391, 306955, 396251, 1981255, 4358761, 21793805]

約数ペア:

[(1, 21793805), (5, 4358761), (11, 1981255), (55, 396251), (71, 306955), (355, 61391), (781, 27905), (3905, 5581)]