18871216

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^2\times {\mathrm{997}}^1$

素因数の和:1038

約数の個数: 60

約数和(自身を含む): 45293232

約数和(自身を除く): 26422016

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 91, 104, 112, 169, 182, 208, 338, 364, 676, 728, 997, 1183, 1352, 1456, 1994, 2366, 2704, 3988, 4732, 6979, 7976, 9464, 12961, 13958, 15952, 18928, 25922, 27916, 51844, 55832, 90727, 103688, 111664, 168493, 181454, 207376, 336986, 362908, 673972, 725816, 1179451, 1347944, 1451632, 2358902, 2695888, 4717804, 9435608, 18871216]

約数ペア:

[(1, 18871216), (2, 9435608), (4, 4717804), (7, 2695888), (8, 2358902), (13, 1451632), (14, 1347944), (16, 1179451), (26, 725816), (28, 673972), (52, 362908), (56, 336986), (91, 207376), (104, 181454), (112, 168493), (169, 111664), (182, 103688), (208, 90727), (338, 55832), (364, 51844), (676, 27916), (728, 25922), (997, 18928), (1183, 15952), (1352, 13958), (1456, 12961), (1994, 9464), (2366, 7976), (2704, 6979), (3988, 4732)]