216973309

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{691}}^1\times {\mathrm{1447}}^1$

素因数の和:2176

約数の個数: 16

約数和(自身を含む): 256516096

約数和(自身を除く): 39542787

約数列:

[1, 7, 31, 217, 691, 1447, 4837, 10129, 21421, 44857, 149947, 313999, 999877, 6999139, 30996187, 216973309]

約数ペア:

[(1, 216973309), (7, 30996187), (31, 6999139), (217, 999877), (691, 313999), (1447, 149947), (4837, 44857), (10129, 21421)]