21557768

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{293}}^1\times {\mathrm{541}}^1$

素因数の和:857

約数の個数: 32

約数和(自身を含む): 43023960

約数和(自身を除く): 21466192

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 293, 541, 586, 1082, 1172, 2164, 2344, 4328, 4981, 9197, 9962, 18394, 19924, 36788, 39848, 73576, 158513, 317026, 634052, 1268104, 2694721, 5389442, 10778884, 21557768]

約数ペア:

[(1, 21557768), (2, 10778884), (4, 5389442), (8, 2694721), (17, 1268104), (34, 634052), (68, 317026), (136, 158513), (293, 73576), (541, 39848), (586, 36788), (1082, 19924), (1172, 18394), (2164, 9962), (2344, 9197), (4328, 4981)]