21031712

素因数分解:

$2^5\times {\mathrm{13}}^2\times {\mathrm{3889}}^1$

素因数の和:3925

約数の個数: 36

約数和(自身を含む): 44847810

約数和(自身を除く): 23816098

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 169, 208, 338, 416, 676, 1352, 2704, 3889, 5408, 7778, 15556, 31112, 50557, 62224, 101114, 124448, 202228, 404456, 657241, 808912, 1314482, 1617824, 2628964, 5257928, 10515856, 21031712]

約数ペア:

[(1, 21031712), (2, 10515856), (4, 5257928), (8, 2628964), (13, 1617824), (16, 1314482), (26, 808912), (32, 657241), (52, 404456), (104, 202228), (169, 124448), (208, 101114), (338, 62224), (416, 50557), (676, 31112), (1352, 15556), (2704, 7778), (3889, 5408)]