21015659

素因数分解:

$7^2\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:243

約数の個数: 24

約数和(自身を含む): 25444800

約数和(自身を除く): 4429141

約数列:

[1, 7, 49, 61, 79, 89, 427, 553, 623, 2989, 3871, 4361, 4819, 5429, 7031, 33733, 38003, 49217, 236131, 266021, 344519, 428891, 3002237, 21015659]

約数ペア:

[(1, 21015659), (7, 3002237), (49, 428891), (61, 344519), (79, 266021), (89, 236131), (427, 49217), (553, 38003), (623, 33733), (2989, 7031), (3871, 5429), (4361, 4819)]