18187780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{5381}}^1$

素因数の和:5416

約数の個数: 36

約数和(自身を含む): 41366052

約数和(自身を除く): 23178272

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 5381, 10762, 21524, 26905, 53810, 69953, 107620, 139906, 279812, 349765, 699530, 909389, 1399060, 1818778, 3637556, 4546945, 9093890, 18187780]

約数ペア:

[(1, 18187780), (2, 9093890), (4, 4546945), (5, 3637556), (10, 1818778), (13, 1399060), (20, 909389), (26, 699530), (52, 349765), (65, 279812), (130, 139906), (169, 107620), (260, 69953), (338, 53810), (676, 26905), (845, 21524), (1690, 10762), (3380, 5381)]