20899055

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1\times {\mathrm{337}}^1$

素因数の和:578

約数の個数: 16

約数和(自身を含む): 25633920

約数和(自身を除く): 4734865

約数列:

[1, 5, 79, 157, 337, 395, 785, 1685, 12403, 26623, 52909, 62015, 133115, 264545, 4179811, 20899055]

約数ペア:

[(1, 20899055), (5, 4179811), (79, 264545), (157, 133115), (337, 62015), (395, 52909), (785, 26623), (1685, 12403)]