21497560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76777}}^1$

素因数の和:76795

約数の個数: 32

約数和(自身を含む): 55280160

約数和(自身を除く): 33782600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76777, 153554, 307108, 383885, 537439, 614216, 767770, 1074878, 1535540, 2149756, 2687195, 3071080, 4299512, 5374390, 10748780, 21497560]

約数ペア:

[(1, 21497560), (2, 10748780), (4, 5374390), (5, 4299512), (7, 3071080), (8, 2687195), (10, 2149756), (14, 1535540), (20, 1074878), (28, 767770), (35, 614216), (40, 537439), (56, 383885), (70, 307108), (140, 153554), (280, 76777)]