19988210

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181711}}^1$

素因数の和:181729

約数の個数: 16

約数和(自身を含む): 39249792

約数和(自身を除く): 19261582

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 181711, 363422, 908555, 1817110, 1998821, 3997642, 9994105, 19988210]

約数ペア:

[(1, 19988210), (2, 9994105), (5, 3997642), (10, 1998821), (11, 1817110), (22, 908555), (55, 363422), (110, 181711)]