21865151

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{443}}^1\times {\mathrm{641}}^1$

素因数の和:1102

約数の個数: 16

約数和(自身を含む): 27364608

約数和(自身を除く): 5499457

約数列:

[1, 7, 11, 77, 443, 641, 3101, 4487, 4873, 7051, 34111, 49357, 283963, 1987741, 3123593, 21865151]

約数ペア:

[(1, 21865151), (7, 3123593), (11, 1987741), (77, 283963), (443, 49357), (641, 34111), (3101, 7051), (4487, 4873)]