21174321

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{4967}}^1$

素因数の和:5013

約数の個数: 24

約数和(自身を含む): 33981120

約数和(自身を除く): 12806799

約数列:

[1, 3, 7, 21, 29, 49, 87, 147, 203, 609, 1421, 4263, 4967, 14901, 34769, 104307, 144043, 243383, 432129, 730149, 1008301, 3024903, 7058107, 21174321]

約数ペア:

[(1, 21174321), (3, 7058107), (7, 3024903), (21, 1008301), (29, 730149), (49, 432129), (87, 243383), (147, 144043), (203, 104307), (609, 34769), (1421, 14901), (4263, 4967)]