19781740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89917}}^1$

素因数の和:89937

約数の個数: 24

約数和(自身を含む): 45318672

約数和(自身を除く): 25536932

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 89917, 179834, 359668, 449585, 899170, 989087, 1798340, 1978174, 3956348, 4945435, 9890870, 19781740]

約数ペア:

[(1, 19781740), (2, 9890870), (4, 4945435), (5, 3956348), (10, 1978174), (11, 1798340), (20, 989087), (22, 899170), (44, 449585), (55, 359668), (110, 179834), (220, 89917)]