7720881

素因数分解:

$3^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{991}}^1$

素因数の和:1061

約数の個数: 24

約数和(自身を含む): 12213504

約数和(自身を除く): 4492623

約数列:

[1, 3, 7, 21, 49, 53, 147, 159, 371, 991, 1113, 2597, 2973, 6937, 7791, 20811, 48559, 52523, 145677, 157569, 367661, 1102983, 2573627, 7720881]

約数ペア:

[(1, 7720881), (3, 2573627), (7, 1102983), (21, 367661), (49, 157569), (53, 145677), (147, 52523), (159, 48559), (371, 20811), (991, 7791), (1113, 6937), (2597, 2973)]