20378169

素因数分解:

$3^3\times 7^2\times {\mathrm{73}}^1\times {\mathrm{211}}^1$

素因数の和:307

約数の個数: 48

約数和(自身を含む): 35768640

約数和(自身を除く): 15390471

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 73, 147, 189, 211, 219, 441, 511, 633, 657, 1323, 1477, 1533, 1899, 1971, 3577, 4431, 4599, 5697, 10339, 10731, 13293, 13797, 15403, 31017, 32193, 39879, 46209, 93051, 96579, 107821, 138627, 279153, 323463, 415881, 754747, 970389, 2264241, 2911167, 6792723, 20378169]

約数ペア:

[(1, 20378169), (3, 6792723), (7, 2911167), (9, 2264241), (21, 970389), (27, 754747), (49, 415881), (63, 323463), (73, 279153), (147, 138627), (189, 107821), (211, 96579), (219, 93051), (441, 46209), (511, 39879), (633, 32193), (657, 31017), (1323, 15403), (1477, 13797), (1533, 13293), (1899, 10731), (1971, 10339), (3577, 5697), (4431, 4599)]