21129524

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{347}}^1\times {\mathrm{1171}}^1$

素因数の和:1535

約数の個数: 24

約数和(自身を含む): 39969888

約数和(自身を除く): 18840364

約数列:

[1, 2, 4, 13, 26, 52, 347, 694, 1171, 1388, 2342, 4511, 4684, 9022, 15223, 18044, 30446, 60892, 406337, 812674, 1625348, 5282381, 10564762, 21129524]

約数ペア:

[(1, 21129524), (2, 10564762), (4, 5282381), (13, 1625348), (26, 812674), (52, 406337), (347, 60892), (694, 30446), (1171, 18044), (1388, 15223), (2342, 9022), (4511, 4684)]