21039812

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{277}}^1\times {\mathrm{1117}}^1$

素因数の和:1415

約数の個数: 24

約数和(自身を含む): 39161304

約数和(自身を除く): 18121492

約数列:

[1, 2, 4, 17, 34, 68, 277, 554, 1108, 1117, 2234, 4468, 4709, 9418, 18836, 18989, 37978, 75956, 309409, 618818, 1237636, 5259953, 10519906, 21039812]

約数ペア:

[(1, 21039812), (2, 10519906), (4, 5259953), (17, 1237636), (34, 618818), (68, 309409), (277, 75956), (554, 37978), (1108, 18989), (1117, 18836), (2234, 9418), (4468, 4709)]