20915590

素因数分解:

$2^1\times 5^1\times {\mathrm{653}}^1\times {\mathrm{3203}}^1$

素因数の和:3863

約数の個数: 16

約数和(自身を含む): 37717488

約数和(自身を除く): 16801898

約数列:

[1, 2, 5, 10, 653, 1306, 3203, 3265, 6406, 6530, 16015, 32030, 2091559, 4183118, 10457795, 20915590]

約数ペア:

[(1, 20915590), (2, 10457795), (5, 4183118), (10, 2091559), (653, 32030), (1306, 16015), (3203, 6530), (3265, 6406)]