21312172

素因数分解:

$2^2\times 7^1\times {\mathrm{409}}^1\times {\mathrm{1861}}^1$

素因数の和:2281

約数の個数: 24

約数和(自身を含む): 42751520

約数和(自身を除く): 21439348

約数列:

[1, 2, 4, 7, 14, 28, 409, 818, 1636, 1861, 2863, 3722, 5726, 7444, 11452, 13027, 26054, 52108, 761149, 1522298, 3044596, 5328043, 10656086, 21312172]

約数ペア:

[(1, 21312172), (2, 10656086), (4, 5328043), (7, 3044596), (14, 1522298), (28, 761149), (409, 52108), (818, 26054), (1636, 13027), (1861, 11452), (2863, 7444), (3722, 5726)]