18917140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{7817}}^1$

素因数の和:7848

約数の個数: 36

約数和(自身を含む): 43671348

約数和(自身を除く): 24754208

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 7817, 15634, 31268, 39085, 78170, 85987, 156340, 171974, 343948, 429935, 859870, 945857, 1719740, 1891714, 3783428, 4729285, 9458570, 18917140]

約数ペア:

[(1, 18917140), (2, 9458570), (4, 4729285), (5, 3783428), (10, 1891714), (11, 1719740), (20, 945857), (22, 859870), (44, 429935), (55, 343948), (110, 171974), (121, 156340), (220, 85987), (242, 78170), (484, 39085), (605, 31268), (1210, 15634), (2420, 7817)]