21123865

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{19469}}^1$

素因数の和:19512

約数の個数: 16

約数和(自身を含む): 29905920

約数和(自身を除く): 8782055

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 19469, 97345, 136283, 603539, 681415, 3017695, 4224773, 21123865]

約数ペア:

[(1, 21123865), (5, 4224773), (7, 3017695), (31, 681415), (35, 603539), (155, 136283), (217, 97345), (1085, 19469)]