19439945

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:126

約数の個数: 64

約数和(自身を含む): 30965760

約数和(自身を除く): 11525815

約数列:

[1, 5, 7, 19, 23, 31, 35, 41, 95, 115, 133, 155, 161, 205, 217, 287, 437, 589, 665, 713, 779, 805, 943, 1085, 1271, 1435, 2185, 2945, 3059, 3565, 3895, 4123, 4715, 4991, 5453, 6355, 6601, 8897, 13547, 15295, 17917, 20615, 24149, 24955, 27265, 29233, 33005, 44485, 67735, 89585, 94829, 120745, 125419, 146165, 169043, 204631, 474145, 555427, 627095, 845215, 1023155, 2777135, 3887989, 19439945]

約数ペア:

[(1, 19439945), (5, 3887989), (7, 2777135), (19, 1023155), (23, 845215), (31, 627095), (35, 555427), (41, 474145), (95, 204631), (115, 169043), (133, 146165), (155, 125419), (161, 120745), (205, 94829), (217, 89585), (287, 67735), (437, 44485), (589, 33005), (665, 29233), (713, 27265), (779, 24955), (805, 24149), (943, 20615), (1085, 17917), (1271, 15295), (1435, 13547), (2185, 8897), (2945, 6601), (3059, 6355), (3565, 5453), (3895, 4991), (4123, 4715)]