21086289

素因数分解:

$3^2\times 7^1\times {\mathrm{197}}^1\times {\mathrm{1699}}^1$

素因数の和:1909

約数の個数: 24

約数和(自身を含む): 35006400

約数和(自身を除く): 13920111

約数列:

[1, 3, 7, 9, 21, 63, 197, 591, 1379, 1699, 1773, 4137, 5097, 11893, 12411, 15291, 35679, 107037, 334703, 1004109, 2342921, 3012327, 7028763, 21086289]

約数ペア:

[(1, 21086289), (3, 7028763), (7, 3012327), (9, 2342921), (21, 1004109), (63, 334703), (197, 107037), (591, 35679), (1379, 15291), (1699, 12411), (1773, 11893), (4137, 5097)]