20971353

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{673}}^1$

素因数の和:753

約数の個数: 32

約数和(自身を含む): 32610816

約数和(自身を除く): 11639463

約数列:

[1, 3, 13, 17, 39, 47, 51, 141, 221, 611, 663, 673, 799, 1833, 2019, 2397, 8749, 10387, 11441, 26247, 31161, 31631, 34323, 94893, 148733, 411203, 446199, 537727, 1233609, 1613181, 6990451, 20971353]

約数ペア:

[(1, 20971353), (3, 6990451), (13, 1613181), (17, 1233609), (39, 537727), (47, 446199), (51, 411203), (141, 148733), (221, 94893), (611, 34323), (663, 31631), (673, 31161), (799, 26247), (1833, 11441), (2019, 10387), (2397, 8749)]