21478105

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{131}}^1\times {\mathrm{271}}^1$

素因数の和:429

約数の個数: 24

約数和(自身を含む): 28651392

約数和(自身を除く): 7173287

約数列:

[1, 5, 11, 55, 121, 131, 271, 605, 655, 1355, 1441, 2981, 7205, 14905, 15851, 32791, 35501, 79255, 163955, 177505, 390511, 1952555, 4295621, 21478105]

約数ペア:

[(1, 21478105), (5, 4295621), (11, 1952555), (55, 390511), (121, 177505), (131, 163955), (271, 79255), (605, 35501), (655, 32791), (1355, 15851), (1441, 14905), (2981, 7205)]