80666540

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{37003}}^1$

素因数の和:37121

約数の個数: 24

約数和(自身を含む): 170958480

約数和(自身を除く): 90291940

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 37003, 74006, 148012, 185015, 370030, 740060, 4033327, 8066654, 16133308, 20166635, 40333270, 80666540]

約数ペア:

[(1, 80666540), (2, 40333270), (4, 20166635), (5, 16133308), (10, 8066654), (20, 4033327), (109, 740060), (218, 370030), (436, 185015), (545, 148012), (1090, 74006), (2180, 37003)]