21428141

素因数分解:

$7^2\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{107}}^1$

素因数の和:249

約数の個数: 24

約数和(自身を含む): 25953696

約数和(自身を除く): 4525555

約数列:

[1, 7, 49, 61, 67, 107, 427, 469, 749, 2989, 3283, 4087, 5243, 6527, 7169, 28609, 45689, 50183, 200263, 319823, 351281, 437309, 3061163, 21428141]

約数ペア:

[(1, 21428141), (7, 3061163), (49, 437309), (61, 351281), (67, 319823), (107, 200263), (427, 50183), (469, 45689), (749, 28609), (2989, 7169), (3283, 6527), (4087, 5243)]