21979580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{8263}}^1$

素因数の和:8298

約数の個数: 48

約数和(自身を含む): 55534080

約数和(自身を除く): 33554500

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 8263, 16526, 33052, 41315, 57841, 82630, 115682, 156997, 165260, 231364, 289205, 313994, 578410, 627988, 784985, 1098979, 1156820, 1569970, 2197958, 3139940, 4395916, 5494895, 10989790, 21979580]

約数ペア:

[(1, 21979580), (2, 10989790), (4, 5494895), (5, 4395916), (7, 3139940), (10, 2197958), (14, 1569970), (19, 1156820), (20, 1098979), (28, 784985), (35, 627988), (38, 578410), (70, 313994), (76, 289205), (95, 231364), (133, 165260), (140, 156997), (190, 115682), (266, 82630), (380, 57841), (532, 41315), (665, 33052), (1330, 16526), (2660, 8263)]