21556276

素因数分解:

$2^2\times 7^2\times {\mathrm{109}}^1\times {\mathrm{1009}}^1$

素因数の和:1136

約数の個数: 36

約数和(自身を含む): 44328900

約数和(自身を除く): 22772624

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 109, 196, 218, 436, 763, 1009, 1526, 2018, 3052, 4036, 5341, 7063, 10682, 14126, 21364, 28252, 49441, 98882, 109981, 197764, 219962, 439924, 769867, 1539734, 3079468, 5389069, 10778138, 21556276]

約数ペア:

[(1, 21556276), (2, 10778138), (4, 5389069), (7, 3079468), (14, 1539734), (28, 769867), (49, 439924), (98, 219962), (109, 197764), (196, 109981), (218, 98882), (436, 49441), (763, 28252), (1009, 21364), (1526, 14126), (2018, 10682), (3052, 7063), (4036, 5341)]