20512119740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{509}}^1\times {\mathrm{287849}}^1$

素因数の和:288374

約数の個数: 48

約数和(自身を含む): 49325976000

約数和(自身を除く): 28813856260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 509, 1018, 2036, 2545, 3563, 5090, 7126, 10180, 14252, 17815, 35630, 71260, 287849, 575698, 1151396, 1439245, 2014943, 2878490, 4029886, 5756980, 8059772, 10074715, 20149430, 40298860, 146515141, 293030282, 586060564, 732575705, 1025605987, 1465151410, 2051211974, 2930302820, 4102423948, 5128029935, 10256059870, 20512119740]

約数ペア:

[(1, 20512119740), (2, 10256059870), (4, 5128029935), (5, 4102423948), (7, 2930302820), (10, 2051211974), (14, 1465151410), (20, 1025605987), (28, 732575705), (35, 586060564), (70, 293030282), (140, 146515141), (509, 40298860), (1018, 20149430), (2036, 10074715), (2545, 8059772), (3563, 5756980), (5090, 4029886), (7126, 2878490), (10180, 2014943), (14252, 1439245), (17815, 1151396), (35630, 575698), (71260, 287849)]