21705940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{63841}}^1$

素因数の和:63867

約数の個数: 24

約数和(自身を含む): 48264552

約数和(自身を除く): 26558612

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 63841, 127682, 255364, 319205, 638410, 1085297, 1276820, 2170594, 4341188, 5426485, 10852970, 21705940]

約数ペア:

[(1, 21705940), (2, 10852970), (4, 5426485), (5, 4341188), (10, 2170594), (17, 1276820), (20, 1085297), (34, 638410), (68, 319205), (85, 255364), (170, 127682), (340, 63841)]