21090575

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{271}}^1\times {\mathrm{283}}^1$

素因数の和:575

約数の個数: 24

約数和(自身を含む): 28736256

約数和(自身を除く): 7645681

約数列:

[1, 5, 11, 25, 55, 271, 275, 283, 1355, 1415, 2981, 3113, 6775, 7075, 14905, 15565, 74525, 76693, 77825, 383465, 843623, 1917325, 4218115, 21090575]

約数ペア:

[(1, 21090575), (5, 4218115), (11, 1917325), (25, 843623), (55, 383465), (271, 77825), (275, 76693), (283, 74525), (1355, 15565), (1415, 14905), (2981, 7075), (3113, 6775)]