21906549

素因数分解:

$3^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{3907}}^1$

素因数の和:4009

約数の個数: 24

約数和(自身を含む): 36578880

約数和(自身を除く): 14672331

約数列:

[1, 3, 7, 9, 21, 63, 89, 267, 623, 801, 1869, 3907, 5607, 11721, 27349, 35163, 82047, 246141, 347723, 1043169, 2434061, 3129507, 7302183, 21906549]

約数ペア:

[(1, 21906549), (3, 7302183), (7, 3129507), (9, 2434061), (21, 1043169), (63, 347723), (89, 246141), (267, 82047), (623, 35163), (801, 27349), (1869, 11721), (3907, 5607)]