20918751

素因数分解:

$3^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{4721}}^1$

素因数の和:4942

約数の個数: 16

約数和(自身を含む): 32034048

約数和(自身を除く): 11115297

約数列:

[1, 3, 7, 21, 211, 633, 1477, 4431, 4721, 14163, 33047, 99141, 996131, 2988393, 6972917, 20918751]

約数ペア:

[(1, 20918751), (3, 6972917), (7, 2988393), (21, 996131), (211, 99141), (633, 33047), (1477, 14163), (4431, 4721)]