20880215

素因数分解:

$5^1\times {\mathrm{67}}^1\times {\mathrm{157}}^1\times {\mathrm{397}}^1$

素因数の和:626

約数の個数: 16

約数和(自身を含む): 25656672

約数和(自身を除く): 4776457

約数列:

[1, 5, 67, 157, 335, 397, 785, 1985, 10519, 26599, 52595, 62329, 132995, 311645, 4176043, 20880215]

約数ペア:

[(1, 20880215), (5, 4176043), (67, 311645), (157, 132995), (335, 62329), (397, 52595), (785, 26599), (1985, 10519)]