18998540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{86357}}^1$

素因数の和:86377

約数の個数: 24

約数和(自身を含む): 43524432

約数和(自身を除く): 24525892

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 86357, 172714, 345428, 431785, 863570, 949927, 1727140, 1899854, 3799708, 4749635, 9499270, 18998540]

約数ペア:

[(1, 18998540), (2, 9499270), (4, 4749635), (5, 3799708), (10, 1899854), (11, 1727140), (20, 949927), (22, 863570), (44, 431785), (55, 345428), (110, 172714), (220, 86357)]