15721520

素因数分解:

$2^4\times 5^1\times {\mathrm{196519}}^1$

素因数の和:196532

約数の個数: 20

約数和(自身を含む): 36552720

約数和(自身を除く): 20831200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 196519, 393038, 786076, 982595, 1572152, 1965190, 3144304, 3930380, 7860760, 15721520]

約数ペア:

[(1, 15721520), (2, 7860760), (4, 3930380), (5, 3144304), (8, 1965190), (10, 1572152), (16, 982595), (20, 786076), (40, 393038), (80, 196519)]