21205408

素因数分解:

$2^5\times 7^1\times {\mathrm{137}}^1\times {\mathrm{691}}^1$

素因数の和:845

約数の個数: 48

約数和(自身を含む): 48129984

約数和(自身を除く): 26924576

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 112, 137, 224, 274, 548, 691, 959, 1096, 1382, 1918, 2192, 2764, 3836, 4384, 4837, 5528, 7672, 9674, 11056, 15344, 19348, 22112, 30688, 38696, 77392, 94667, 154784, 189334, 378668, 662669, 757336, 1325338, 1514672, 2650676, 3029344, 5301352, 10602704, 21205408]

約数ペア:

[(1, 21205408), (2, 10602704), (4, 5301352), (7, 3029344), (8, 2650676), (14, 1514672), (16, 1325338), (28, 757336), (32, 662669), (56, 378668), (112, 189334), (137, 154784), (224, 94667), (274, 77392), (548, 38696), (691, 30688), (959, 22112), (1096, 19348), (1382, 15344), (1918, 11056), (2192, 9674), (2764, 7672), (3836, 5528), (4384, 4837)]