19972791

素因数分解:

$3^3\times {\mathrm{47}}^1\times {\mathrm{15739}}^1$

素因数の和:15795

約数の個数: 16

約数和(自身を含む): 30220800

約数和(自身を除く): 10248009

約数列:

[1, 3, 9, 27, 47, 141, 423, 1269, 15739, 47217, 141651, 424953, 739733, 2219199, 6657597, 19972791]

約数ペア:

[(1, 19972791), (3, 6657597), (9, 2219199), (27, 739733), (47, 424953), (141, 141651), (423, 47217), (1269, 15739)]