20991962

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{3331}}^1$

素因数の和:3493

約数の個数: 16

約数和(自身を含む): 33106752

約数和(自身を除く): 12114790

約数列:

[1, 2, 23, 46, 137, 274, 3151, 3331, 6302, 6662, 76613, 153226, 456347, 912694, 10495981, 20991962]

約数ペア:

[(1, 20991962), (2, 10495981), (23, 912694), (46, 456347), (137, 153226), (274, 76613), (3151, 6662), (3331, 6302)]