20668739

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{457}}^1$

素因数の和:555

約数の個数: 24

約数和(自身を含む): 26314848

約数和(自身を除く): 5646109

約数列:

[1, 7, 13, 49, 71, 91, 457, 497, 637, 923, 3199, 3479, 5941, 6461, 22393, 32447, 41587, 45227, 227129, 291109, 421811, 1589903, 2952677, 20668739]

約数ペア:

[(1, 20668739), (7, 2952677), (13, 1589903), (49, 421811), (71, 291109), (91, 227129), (457, 45227), (497, 41587), (637, 32447), (923, 22393), (3199, 6461), (3479, 5941)]