20438020

素因数分解:

$2^2\times 5^1\times {\mathrm{431}}^1\times {\mathrm{2371}}^1$

素因数の和:2811

約数の個数: 24

約数和(自身を含む): 43037568

約数和(自身を除く): 22599548

約数列:

[1, 2, 4, 5, 10, 20, 431, 862, 1724, 2155, 2371, 4310, 4742, 8620, 9484, 11855, 23710, 47420, 1021901, 2043802, 4087604, 5109505, 10219010, 20438020]

約数ペア:

[(1, 20438020), (2, 10219010), (4, 5109505), (5, 4087604), (10, 2043802), (20, 1021901), (431, 47420), (862, 23710), (1724, 11855), (2155, 9484), (2371, 8620), (4310, 4742)]