21121654

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{4243}}^1$

素因数の和:4395

約数の個数: 16

約数和(自身を含む): 33612480

約数和(自身を除く): 12490826

約数列:

[1, 2, 19, 38, 131, 262, 2489, 4243, 4978, 8486, 80617, 161234, 555833, 1111666, 10560827, 21121654]

約数ペア:

[(1, 21121654), (2, 10560827), (19, 1111666), (38, 555833), (131, 161234), (262, 80617), (2489, 8486), (4243, 4978)]