21128584

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{39419}}^1$

素因数の和:39492

約数の個数: 16

約数和(自身を含む): 40208400

約数和(自身を除く): 19079816

約数列:

[1, 2, 4, 8, 67, 134, 268, 536, 39419, 78838, 157676, 315352, 2641073, 5282146, 10564292, 21128584]

約数ペア:

[(1, 21128584), (2, 10564292), (4, 5282146), (8, 2641073), (67, 315352), (134, 157676), (268, 78838), (536, 39419)]