21320565

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{10687}}^1$

素因数の和:10721

約数の個数: 32

約数和(自身を含む): 41041920

約数和(自身を除く): 19721355

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 399, 665, 1995, 10687, 32061, 53435, 74809, 160305, 203053, 224427, 374045, 609159, 1015265, 1122135, 1421371, 3045795, 4264113, 7106855, 21320565]

約数ペア:

[(1, 21320565), (3, 7106855), (5, 4264113), (7, 3045795), (15, 1421371), (19, 1122135), (21, 1015265), (35, 609159), (57, 374045), (95, 224427), (105, 203053), (133, 160305), (285, 74809), (399, 53435), (665, 32061), (1995, 10687)]