21313579

素因数分解:

$7^2\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{283}}^1$

素因数の和:379

約数の個数: 24

約数和(自身を含む): 26224560

約数和(自身を除く): 4910981

約数列:

[1, 7, 29, 49, 53, 203, 283, 371, 1421, 1537, 1981, 2597, 8207, 10759, 13867, 14999, 57449, 75313, 104993, 402143, 434971, 734951, 3044797, 21313579]

約数ペア:

[(1, 21313579), (7, 3044797), (29, 734951), (49, 434971), (53, 402143), (203, 104993), (283, 75313), (371, 57449), (1421, 14999), (1537, 13867), (1981, 10759), (2597, 8207)]