209987998

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{867719}}^1$

素因数の和:867743

約数の個数: 12

約数和(自身を含む): 346220280

約数和(自身を除く): 136232282

約数列:

[1, 2, 11, 22, 121, 242, 867719, 1735438, 9544909, 19089818, 104993999, 209987998]

約数ペア:

[(1, 209987998), (2, 104993999), (11, 19089818), (22, 9544909), (121, 1735438), (242, 867719)]