19215987

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{3533}}^1$

素因数の和:3587

約数の個数: 24

約数和(自身を含む): 30618576

約数和(自身を除く): 11402589

約数列:

[1, 3, 7, 21, 37, 49, 111, 147, 259, 777, 1813, 3533, 5439, 10599, 24731, 74193, 130721, 173117, 392163, 519351, 915047, 2745141, 6405329, 19215987]

約数ペア:

[(1, 19215987), (3, 6405329), (7, 2745141), (21, 915047), (37, 519351), (49, 392163), (111, 173117), (147, 130721), (259, 74193), (777, 24731), (1813, 10599), (3533, 5439)]