21261321

素因数分解:

$3^2\times {\mathrm{29}}^2\times {\mathrm{53}}^2$

素因数の和:170

約数の個数: 27

約数和(自身を含む): 32417749

約数和(自身を除く): 11156428

約数列:

[1, 3, 9, 29, 53, 87, 159, 261, 477, 841, 1537, 2523, 2809, 4611, 7569, 8427, 13833, 25281, 44573, 81461, 133719, 244383, 401157, 733149, 2362369, 7087107, 21261321]

約数ペア:

[(1, 21261321), (3, 7087107), (9, 2362369), (29, 733149), (53, 401157), (87, 244383), (159, 133719), (261, 81461), (477, 44573), (841, 25281), (1537, 13833), (2523, 8427), (2809, 7569)]