20516080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19727}}^1$

素因数の和:19753

約数の個数: 40

約数和(自身を含む): 51371712

約数和(自身を除く): 30855632

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19727, 39454, 78908, 98635, 157816, 197270, 256451, 315632, 394540, 512902, 789080, 1025804, 1282255, 1578160, 2051608, 2564510, 4103216, 5129020, 10258040, 20516080]

約数ペア:

[(1, 20516080), (2, 10258040), (4, 5129020), (5, 4103216), (8, 2564510), (10, 2051608), (13, 1578160), (16, 1282255), (20, 1025804), (26, 789080), (40, 512902), (52, 394540), (65, 315632), (80, 256451), (104, 197270), (130, 157816), (208, 98635), (260, 78908), (520, 39454), (1040, 19727)]