21380458810

素因数分解:

$2^1\times 5^1\times {\mathrm{103}}^1\times {\mathrm{20757727}}^1$

素因数の和:20757837

約数の個数: 16

約数和(自身を含む): 38858466816

約数和(自身を除く): 17478008006

約数列:

[1, 2, 5, 10, 103, 206, 515, 1030, 20757727, 41515454, 103788635, 207577270, 2138045881, 4276091762, 10690229405, 21380458810]

約数ペア:

[(1, 21380458810), (2, 10690229405), (5, 4276091762), (10, 2138045881), (103, 207577270), (206, 103788635), (515, 41515454), (1030, 20757727)]