21653511

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{607}}^1$

素因数の和:691

約数の個数: 32

約数和(自身を含む): 33619968

約数和(自身を除く): 11966457

約数列:

[1, 3, 11, 23, 33, 47, 69, 141, 253, 517, 607, 759, 1081, 1551, 1821, 3243, 6677, 11891, 13961, 20031, 28529, 35673, 41883, 85587, 153571, 313819, 460713, 656167, 941457, 1968501, 7217837, 21653511]

約数ペア:

[(1, 21653511), (3, 7217837), (11, 1968501), (23, 941457), (33, 656167), (47, 460713), (69, 313819), (141, 153571), (253, 85587), (517, 41883), (607, 35673), (759, 28529), (1081, 20031), (1551, 13961), (1821, 11891), (3243, 6677)]