9991980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{55511}}^1$

素因数の和:55526

約数の個数: 36

約数和(自身を含む): 30309552

約数和(自身を除く): 20317572

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 55511, 111022, 166533, 222044, 277555, 333066, 499599, 555110, 666132, 832665, 999198, 1110220, 1665330, 1998396, 2497995, 3330660, 4995990, 9991980]

約数ペア:

[(1, 9991980), (2, 4995990), (3, 3330660), (4, 2497995), (5, 1998396), (6, 1665330), (9, 1110220), (10, 999198), (12, 832665), (15, 666132), (18, 555110), (20, 499599), (30, 333066), (36, 277555), (45, 222044), (60, 166533), (90, 111022), (180, 55511)]