19819792

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{239}}^1$

素因数の和:391

約数の個数: 40

約数和(自身を含む): 39640320

約数和(自身を除く): 19820528

約数列:

[1, 2, 4, 8, 16, 71, 73, 142, 146, 239, 284, 292, 478, 568, 584, 956, 1136, 1168, 1912, 3824, 5183, 10366, 16969, 17447, 20732, 33938, 34894, 41464, 67876, 69788, 82928, 135752, 139576, 271504, 279152, 1238737, 2477474, 4954948, 9909896, 19819792]

約数ペア:

[(1, 19819792), (2, 9909896), (4, 4954948), (8, 2477474), (16, 1238737), (71, 279152), (73, 271504), (142, 139576), (146, 135752), (239, 82928), (284, 69788), (292, 67876), (478, 41464), (568, 34894), (584, 33938), (956, 20732), (1136, 17447), (1168, 16969), (1912, 10366), (3824, 5183)]