18870555

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{281}}^1$

素因数の和:348

約数の個数: 48

約数和(自身を含む): 34205472

約数和(自身を除く): 15334917

約数列:

[1, 3, 5, 11, 15, 33, 37, 55, 111, 121, 165, 185, 281, 363, 407, 555, 605, 843, 1221, 1405, 1815, 2035, 3091, 4215, 4477, 6105, 9273, 10397, 13431, 15455, 22385, 31191, 34001, 46365, 51985, 67155, 102003, 114367, 155955, 170005, 343101, 510015, 571835, 1258037, 1715505, 3774111, 6290185, 18870555]

約数ペア:

[(1, 18870555), (3, 6290185), (5, 3774111), (11, 1715505), (15, 1258037), (33, 571835), (37, 510015), (55, 343101), (111, 170005), (121, 155955), (165, 114367), (185, 102003), (281, 67155), (363, 51985), (407, 46365), (555, 34001), (605, 31191), (843, 22385), (1221, 15455), (1405, 13431), (1815, 10397), (2035, 9273), (3091, 6105), (4215, 4477)]