28700920

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1109}}^1$

素因数の和:1767

約数の個数: 32

約数和(自身を含む): 64735200

約数和(自身を除く): 36034280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 1109, 1294, 2218, 2588, 3235, 4436, 5176, 5545, 6470, 8872, 11090, 12940, 22180, 25880, 44360, 717523, 1435046, 2870092, 3587615, 5740184, 7175230, 14350460, 28700920]

約数ペア:

[(1, 28700920), (2, 14350460), (4, 7175230), (5, 5740184), (8, 3587615), (10, 2870092), (20, 1435046), (40, 717523), (647, 44360), (1109, 25880), (1294, 22180), (2218, 12940), (2588, 11090), (3235, 8872), (4436, 6470), (5176, 5545)]