20391049

素因数分解:

$7^1\times {\mathrm{59}}^1\times {\mathrm{97}}^1\times {\mathrm{509}}^1$

素因数の和:672

約数の個数: 16

約数和(自身を含む): 23990400

約数和(自身を除く): 3599351

約数列:

[1, 7, 59, 97, 413, 509, 679, 3563, 5723, 30031, 40061, 49373, 210217, 345611, 2913007, 20391049]

約数ペア:

[(1, 20391049), (7, 2913007), (59, 345611), (97, 210217), (413, 49373), (509, 40061), (679, 30031), (3563, 5723)]