21381971

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{3121}}^1$

素因数の和:3182

約数の個数: 16

約数和(自身を含む): 25175808

約数和(自身を除く): 3793837

約数列:

[1, 13, 17, 31, 221, 403, 527, 3121, 6851, 40573, 53057, 96751, 689741, 1257763, 1644767, 21381971]

約数ペア:

[(1, 21381971), (13, 1644767), (17, 1257763), (31, 689741), (221, 96751), (403, 53057), (527, 40573), (3121, 6851)]