20511057

素因数分解:

$3^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{643}}^1$

素因数の和:698

約数の個数: 32

約数和(自身を含む): 32972800

約数和(自身を除く): 12461743

約数列:

[1, 3, 7, 21, 31, 49, 93, 147, 217, 343, 643, 651, 1029, 1519, 1929, 4501, 4557, 10633, 13503, 19933, 31507, 31899, 59799, 94521, 139531, 220549, 418593, 661647, 976717, 2930151, 6837019, 20511057]

約数ペア:

[(1, 20511057), (3, 6837019), (7, 2930151), (21, 976717), (31, 661647), (49, 418593), (93, 220549), (147, 139531), (217, 94521), (343, 59799), (643, 31899), (651, 31507), (1029, 19933), (1519, 13503), (1929, 10633), (4501, 4557)]