21278642

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19739}}^1$

素因数の和:19766

約数の個数: 24

約数和(自身を含む): 40506480

約数和(自身を除く): 19227838

約数列:

[1, 2, 7, 11, 14, 22, 49, 77, 98, 154, 539, 1078, 19739, 39478, 138173, 217129, 276346, 434258, 967211, 1519903, 1934422, 3039806, 10639321, 21278642]

約数ペア:

[(1, 21278642), (2, 10639321), (7, 3039806), (11, 1934422), (14, 1519903), (22, 967211), (49, 434258), (77, 276346), (98, 217129), (154, 138173), (539, 39478), (1078, 19739)]