20798740

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{151}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 45045504

約数和(自身を除く): 24246764

約数列:

[1, 2, 4, 5, 10, 20, 71, 97, 142, 151, 194, 284, 302, 355, 388, 485, 604, 710, 755, 970, 1420, 1510, 1940, 3020, 6887, 10721, 13774, 14647, 21442, 27548, 29294, 34435, 42884, 53605, 58588, 68870, 73235, 107210, 137740, 146470, 214420, 292940, 1039937, 2079874, 4159748, 5199685, 10399370, 20798740]

約数ペア:

[(1, 20798740), (2, 10399370), (4, 5199685), (5, 4159748), (10, 2079874), (20, 1039937), (71, 292940), (97, 214420), (142, 146470), (151, 137740), (194, 107210), (284, 73235), (302, 68870), (355, 58588), (388, 53605), (485, 42884), (604, 34435), (710, 29294), (755, 27548), (970, 21442), (1420, 14647), (1510, 13774), (1940, 10721), (3020, 6887)]