261511220

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{129461}}^1$

素因数の和:129571

約数の個数: 24

約数和(自身を含む): 554615208

約数和(自身を除く): 293103988

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 129461, 258922, 517844, 647305, 1294610, 2589220, 13075561, 26151122, 52302244, 65377805, 130755610, 261511220]

約数ペア:

[(1, 261511220), (2, 130755610), (4, 65377805), (5, 52302244), (10, 26151122), (20, 13075561), (101, 2589220), (202, 1294610), (404, 647305), (505, 517844), (1010, 258922), (2020, 129461)]