20784020

素因数分解:

$2^2\times 5^1\times {\mathrm{523}}^1\times {\mathrm{1987}}^1$

素因数の和:2519

約数の個数: 24

約数和(自身を含む): 43751904

約数和(自身を除く): 22967884

約数列:

[1, 2, 4, 5, 10, 20, 523, 1046, 1987, 2092, 2615, 3974, 5230, 7948, 9935, 10460, 19870, 39740, 1039201, 2078402, 4156804, 5196005, 10392010, 20784020]

約数ペア:

[(1, 20784020), (2, 10392010), (4, 5196005), (5, 4156804), (10, 2078402), (20, 1039201), (523, 39740), (1046, 19870), (1987, 10460), (2092, 9935), (2615, 7948), (3974, 5230)]