21297424

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{19867}}^1$

素因数の和:19942

約数の個数: 20

約数和(自身を含む): 41881744

約数和(自身を除く): 20584320

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 19867, 39734, 79468, 158936, 317872, 1331089, 2662178, 5324356, 10648712, 21297424]

約数ペア:

[(1, 21297424), (2, 10648712), (4, 5324356), (8, 2662178), (16, 1331089), (67, 317872), (134, 158936), (268, 79468), (536, 39734), (1072, 19867)]