20702961

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{179}}^1\times {\mathrm{181}}^1$

素因数の和:437

約数の個数: 24

約数和(自身を含む): 30663360

約数和(自身を除く): 9960399

約数列:

[1, 3, 9, 71, 179, 181, 213, 537, 543, 639, 1611, 1629, 12709, 12851, 32399, 38127, 38553, 97197, 114381, 115659, 291591, 2300329, 6900987, 20702961]

約数ペア:

[(1, 20702961), (3, 6900987), (9, 2300329), (71, 291591), (179, 115659), (181, 114381), (213, 97197), (537, 38553), (543, 38127), (639, 32399), (1611, 12851), (1629, 12709)]