20689917

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{7723}}^1$

素因数の和:7792

約数の個数: 16

約数和(自身を含む): 29660160

約数和(自身を除く): 8970243

約数列:

[1, 3, 19, 47, 57, 141, 893, 2679, 7723, 23169, 146737, 362981, 440211, 1088943, 6896639, 20689917]

約数ペア:

[(1, 20689917), (3, 6896639), (19, 1088943), (47, 440211), (57, 362981), (141, 146737), (893, 23169), (2679, 7723)]