19998741

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{22147}}^1$

素因数の和:22200

約数の個数: 16

約数和(自身を含む): 31184384

約数和(自身を除く): 11185643

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 22147, 66441, 155029, 465087, 952321, 2856963, 6666247, 19998741]

約数ペア:

[(1, 19998741), (3, 6666247), (7, 2856963), (21, 952321), (43, 465087), (129, 155029), (301, 66441), (903, 22147)]