18528848

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{229}}^1\times {\mathrm{389}}^1$

素因数の和:639

約数の個数: 40

約数和(自身を含む): 38929800

約数和(自身を除く): 20400952

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 229, 389, 458, 778, 916, 1556, 1832, 2977, 3112, 3664, 5057, 5954, 6224, 10114, 11908, 20228, 23816, 40456, 47632, 80912, 89081, 178162, 356324, 712648, 1158053, 1425296, 2316106, 4632212, 9264424, 18528848]

約数ペア:

[(1, 18528848), (2, 9264424), (4, 4632212), (8, 2316106), (13, 1425296), (16, 1158053), (26, 712648), (52, 356324), (104, 178162), (208, 89081), (229, 80912), (389, 47632), (458, 40456), (778, 23816), (916, 20228), (1556, 11908), (1832, 10114), (2977, 6224), (3112, 5954), (3664, 5057)]