20989801

素因数分解:

$7^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1\times {\mathrm{269}}^1$

素因数の和:504

約数の個数: 16

約数和(自身を含む): 24572160

約数和(自身を除く): 3582359

約数列:

[1, 7, 71, 157, 269, 497, 1099, 1883, 11147, 19099, 42233, 78029, 133693, 295631, 2998543, 20989801]

約数ペア:

[(1, 20989801), (7, 2998543), (71, 295631), (157, 133693), (269, 78029), (497, 42233), (1099, 19099), (1883, 11147)]