20097889

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{131}}^1$

素因数の和:277

約数の個数: 24

約数和(自身を含む): 24558336

約数和(自身を除く): 4460447

約数列:

[1, 7, 31, 49, 101, 131, 217, 707, 917, 1519, 3131, 4061, 4949, 6419, 13231, 21917, 28427, 92617, 153419, 198989, 410161, 648319, 2871127, 20097889]

約数ペア:

[(1, 20097889), (7, 2871127), (31, 648319), (49, 410161), (101, 198989), (131, 153419), (217, 92617), (707, 28427), (917, 21917), (1519, 13231), (3131, 6419), (4061, 4949)]