21138585

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2521}}^1$

素因数の和:2585

約数の個数: 32

約数和(自身を含む): 37285248

約数和(自身を除く): 16146663

約数列:

[1, 3, 5, 13, 15, 39, 43, 65, 129, 195, 215, 559, 645, 1677, 2521, 2795, 7563, 8385, 12605, 32773, 37815, 98319, 108403, 163865, 325209, 491595, 542015, 1409239, 1626045, 4227717, 7046195, 21138585]

約数ペア:

[(1, 21138585), (3, 7046195), (5, 4227717), (13, 1626045), (15, 1409239), (39, 542015), (43, 491595), (65, 325209), (129, 163865), (195, 108403), (215, 98319), (559, 37815), (645, 32773), (1677, 12605), (2521, 8385), (2795, 7563)]