21156040

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4943}}^1$

素因数の和:5061

約数の個数: 32

約数和(自身を含む): 48055680

約数和(自身を除く): 26899640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 4943, 9886, 19772, 24715, 39544, 49430, 98860, 197720, 528901, 1057802, 2115604, 2644505, 4231208, 5289010, 10578020, 21156040]

約数ペア:

[(1, 21156040), (2, 10578020), (4, 5289010), (5, 4231208), (8, 2644505), (10, 2115604), (20, 1057802), (40, 528901), (107, 197720), (214, 98860), (428, 49430), (535, 39544), (856, 24715), (1070, 19772), (2140, 9886), (4280, 4943)]