20905388

素因数分解:

$2^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{8389}}^1$

素因数の和:8489

約数の個数: 24

約数和(自身を含む): 42285600

約数和(自身を除く): 21380212

約数列:

[1, 2, 4, 7, 14, 28, 89, 178, 356, 623, 1246, 2492, 8389, 16778, 33556, 58723, 117446, 234892, 746621, 1493242, 2986484, 5226347, 10452694, 20905388]

約数ペア:

[(1, 20905388), (2, 10452694), (4, 5226347), (7, 2986484), (14, 1493242), (28, 746621), (89, 234892), (178, 117446), (356, 58723), (623, 33556), (1246, 16778), (2492, 8389)]