21419853

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2531}}^1$

素因数の和:2585

約数の個数: 32

約数和(自身を含む): 36298752

約数和(自身を除く): 14878899

約数列:

[1, 3, 7, 13, 21, 31, 39, 91, 93, 217, 273, 403, 651, 1209, 2531, 2821, 7593, 8463, 17717, 32903, 53151, 78461, 98709, 230321, 235383, 549227, 690963, 1019993, 1647681, 3059979, 7139951, 21419853]

約数ペア:

[(1, 21419853), (3, 7139951), (7, 3059979), (13, 1647681), (21, 1019993), (31, 690963), (39, 549227), (91, 235383), (93, 230321), (217, 98709), (273, 78461), (403, 53151), (651, 32903), (1209, 17717), (2531, 8463), (2821, 7593)]