20781980

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{35831}}^1$

素因数の和:35869

約数の個数: 24

約数和(自身を含む): 45148320

約数和(自身を除く): 24366340

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 35831, 71662, 143324, 179155, 358310, 716620, 1039099, 2078198, 4156396, 5195495, 10390990, 20781980]

約数ペア:

[(1, 20781980), (2, 10390990), (4, 5195495), (5, 4156396), (10, 2078198), (20, 1039099), (29, 716620), (58, 358310), (116, 179155), (145, 143324), (290, 71662), (580, 35831)]