21278236

素因数分解:

$2^2\times 7^1\times {\mathrm{509}}^1\times {\mathrm{1493}}^1$

素因数の和:2013

約数の個数: 24

約数和(自身を含む): 42668640

約数和(自身を除く): 21390404

約数列:

[1, 2, 4, 7, 14, 28, 509, 1018, 1493, 2036, 2986, 3563, 5972, 7126, 10451, 14252, 20902, 41804, 759937, 1519874, 3039748, 5319559, 10639118, 21278236]

約数ペア:

[(1, 21278236), (2, 10639118), (4, 5319559), (7, 3039748), (14, 1519874), (28, 759937), (509, 41804), (1018, 20902), (1493, 14252), (2036, 10451), (2986, 7126), (3563, 5972)]