21384387

素因数分解:

$3^2\times {\mathrm{53}}^1\times {\mathrm{127}}^1\times {\mathrm{353}}^1$

素因数の和:539

約数の個数: 24

約数和(自身を含む): 31809024

約数和(自身を除く): 10424637

約数列:

[1, 3, 9, 53, 127, 159, 353, 381, 477, 1059, 1143, 3177, 6731, 18709, 20193, 44831, 56127, 60579, 134493, 168381, 403479, 2376043, 7128129, 21384387]

約数ペア:

[(1, 21384387), (3, 7128129), (9, 2376043), (53, 403479), (127, 168381), (159, 134493), (353, 60579), (381, 56127), (477, 44831), (1059, 20193), (1143, 18709), (3177, 6731)]