21285705

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{2777}}^1$

素因数の和:2865

約数の個数: 32

約数和(自身を含む): 39469824

約数和(自身を除く): 18184119

約数列:

[1, 3, 5, 7, 15, 21, 35, 73, 105, 219, 365, 511, 1095, 1533, 2555, 2777, 7665, 8331, 13885, 19439, 41655, 58317, 97195, 202721, 291585, 608163, 1013605, 1419047, 3040815, 4257141, 7095235, 21285705]

約数ペア:

[(1, 21285705), (3, 7095235), (5, 4257141), (7, 3040815), (15, 1419047), (21, 1013605), (35, 608163), (73, 291585), (105, 202721), (219, 97195), (365, 58317), (511, 41655), (1095, 19439), (1533, 13885), (2555, 8331), (2777, 7665)]