21445389

素因数分解:

$3^2\times 7^3\times {\mathrm{6947}}^1$

素因数の和:6974

約数の個数: 24

約数和(自身を含む): 36129600

約数和(自身を除く): 14684211

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 3087, 6947, 20841, 48629, 62523, 145887, 340403, 437661, 1021209, 2382821, 3063627, 7148463, 21445389]

約数ペア:

[(1, 21445389), (3, 7148463), (7, 3063627), (9, 2382821), (21, 1021209), (49, 437661), (63, 340403), (147, 145887), (343, 62523), (441, 48629), (1029, 20841), (3087, 6947)]