21378434

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{138821}}^1$

素因数の和:138841

約数の個数: 16

約数和(自身を含む): 39980736

約数和(自身を除く): 18602302

約数列:

[1, 2, 7, 11, 14, 22, 77, 154, 138821, 277642, 971747, 1527031, 1943494, 3054062, 10689217, 21378434]

約数ペア:

[(1, 21378434), (2, 10689217), (7, 3054062), (11, 1943494), (14, 1527031), (22, 971747), (77, 277642), (154, 138821)]