19972205

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{1721}}^1$

素因数の和:1948

約数の個数: 16

約数和(自身を含む): 26284608

約数和(自身を除く): 6312403

約数列:

[1, 5, 11, 55, 211, 1055, 1721, 2321, 8605, 11605, 18931, 94655, 363131, 1815655, 3994441, 19972205]

約数ペア:

[(1, 19972205), (5, 3994441), (11, 1815655), (55, 363131), (211, 94655), (1055, 18931), (1721, 11605), (2321, 8605)]