12881620

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{311}}^1$

素因数の和:448

約数の個数: 48

約数和(自身を含む): 28828800

約数和(自身を除く): 15947180

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 109, 190, 218, 311, 380, 436, 545, 622, 1090, 1244, 1555, 2071, 2180, 3110, 4142, 5909, 6220, 8284, 10355, 11818, 20710, 23636, 29545, 33899, 41420, 59090, 67798, 118180, 135596, 169495, 338990, 644081, 677980, 1288162, 2576324, 3220405, 6440810, 12881620]

約数ペア:

[(1, 12881620), (2, 6440810), (4, 3220405), (5, 2576324), (10, 1288162), (19, 677980), (20, 644081), (38, 338990), (76, 169495), (95, 135596), (109, 118180), (190, 67798), (218, 59090), (311, 41420), (380, 33899), (436, 29545), (545, 23636), (622, 20710), (1090, 11818), (1244, 10355), (1555, 8284), (2071, 6220), (2180, 5909), (3110, 4142)]