21207543

素因数分解:

$3^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{1621}}^1$

素因数の和:1727

約数の個数: 24

約数和(自身を含む): 33283440

約数和(自身を除く): 12075897

約数列:

[1, 3, 7, 21, 49, 89, 147, 267, 623, 1621, 1869, 4361, 4863, 11347, 13083, 34041, 79429, 144269, 238287, 432807, 1009883, 3029649, 7069181, 21207543]

約数ペア:

[(1, 21207543), (3, 7069181), (7, 3029649), (21, 1009883), (49, 432807), (89, 238287), (147, 144269), (267, 79429), (623, 34041), (1621, 13083), (1869, 11347), (4361, 4863)]