19721876

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{139}}^1\times {\mathrm{449}}^1$

素因数の和:671

約数の個数: 24

約数和(自身を含む): 35280000

約数和(自身を除く): 15558124

約数列:

[1, 2, 4, 79, 139, 158, 278, 316, 449, 556, 898, 1796, 10981, 21962, 35471, 43924, 62411, 70942, 124822, 141884, 249644, 4930469, 9860938, 19721876]

約数ペア:

[(1, 19721876), (2, 9860938), (4, 4930469), (79, 249644), (139, 141884), (158, 124822), (278, 70942), (316, 62411), (449, 43924), (556, 35471), (898, 21962), (1796, 10981)]