20988741

素因数分解:

$3^1\times {\mathrm{73}}^1\times {\mathrm{239}}^1\times {\mathrm{401}}^1$

素因数の和:716

約数の個数: 16

約数和(自身を含む): 28558080

約数和(自身を除く): 7569339

約数列:

[1, 3, 73, 219, 239, 401, 717, 1203, 17447, 29273, 52341, 87819, 95839, 287517, 6996247, 20988741]

約数ペア:

[(1, 20988741), (3, 6996247), (73, 287517), (219, 95839), (239, 87819), (401, 52341), (717, 29273), (1203, 17447)]