20377840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{36389}}^1$

素因数の和:36409

約数の個数: 40

約数和(自身を含む): 54148320

約数和(自身を除く): 33770480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 36389, 72778, 145556, 181945, 254723, 291112, 363890, 509446, 582224, 727780, 1018892, 1273615, 1455560, 2037784, 2547230, 2911120, 4075568, 5094460, 10188920, 20377840]

約数ペア:

[(1, 20377840), (2, 10188920), (4, 5094460), (5, 4075568), (7, 2911120), (8, 2547230), (10, 2037784), (14, 1455560), (16, 1273615), (20, 1018892), (28, 727780), (35, 582224), (40, 509446), (56, 363890), (70, 291112), (80, 254723), (112, 181945), (140, 145556), (280, 72778), (560, 36389)]