21112973

素因数分解:

$7^2\times {\mathrm{59}}^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:249

約数の個数: 24

約数和(自身を含む): 25581600

約数和(自身を除く): 4468627

約数列:

[1, 7, 49, 59, 67, 109, 413, 469, 763, 2891, 3283, 3953, 5341, 6431, 7303, 27671, 45017, 51121, 193697, 315119, 357847, 430877, 3016139, 21112973]

約数ペア:

[(1, 21112973), (7, 3016139), (49, 430877), (59, 357847), (67, 315119), (109, 193697), (413, 51121), (469, 45017), (763, 27671), (2891, 7303), (3283, 6431), (3953, 5341)]