20505947

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{251}}^1\times {\mathrm{1061}}^1$

素因数の和:1330

約数の個数: 16

約数和(自身を含む): 25691904

約数和(自身を除く): 5185957

約数列:

[1, 7, 11, 77, 251, 1061, 1757, 2761, 7427, 11671, 19327, 81697, 266311, 1864177, 2929421, 20505947]

約数ペア:

[(1, 20505947), (7, 2929421), (11, 1864177), (77, 266311), (251, 81697), (1061, 19327), (1757, 11671), (2761, 7427)]