21009585

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{32573}}^1$

素因数の和:32624

約数の個数: 16

約数和(自身を含む): 34398144

約数和(自身を除く): 13388559

約数列:

[1, 3, 5, 15, 43, 129, 215, 645, 32573, 97719, 162865, 488595, 1400639, 4201917, 7003195, 21009585]

約数ペア:

[(1, 21009585), (3, 7003195), (5, 4201917), (15, 1400639), (43, 488595), (129, 162865), (215, 97719), (645, 32573)]