21098812

素因数分解:

$2^2\times 7^2\times {\mathrm{107647}}^1$

素因数の和:107665

約数の個数: 18

約数和(自身を含む): 42951552

約数和(自身を除く): 21852740

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 107647, 215294, 430588, 753529, 1507058, 3014116, 5274703, 10549406, 21098812]

約数ペア:

[(1, 21098812), (2, 10549406), (4, 5274703), (7, 3014116), (14, 1507058), (28, 753529), (49, 430588), (98, 215294), (196, 107647)]