18729972

素因数分解:

$2^2\times 3^2\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{197}}^1$

素因数の和:365

約数の個数: 72

約数和(自身を含む): 50450400

約数和(自身を除く): 31720428

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 19, 36, 38, 57, 76, 114, 139, 171, 197, 228, 278, 342, 394, 417, 556, 591, 684, 788, 834, 1182, 1251, 1668, 1773, 2364, 2502, 2641, 3546, 3743, 5004, 5282, 7092, 7486, 7923, 10564, 11229, 14972, 15846, 22458, 23769, 27383, 31692, 33687, 44916, 47538, 54766, 67374, 82149, 95076, 109532, 134748, 164298, 246447, 328596, 492894, 520277, 985788, 1040554, 1560831, 2081108, 3121662, 4682493, 6243324, 9364986, 18729972]

約数ペア:

[(1, 18729972), (2, 9364986), (3, 6243324), (4, 4682493), (6, 3121662), (9, 2081108), (12, 1560831), (18, 1040554), (19, 985788), (36, 520277), (38, 492894), (57, 328596), (76, 246447), (114, 164298), (139, 134748), (171, 109532), (197, 95076), (228, 82149), (278, 67374), (342, 54766), (394, 47538), (417, 44916), (556, 33687), (591, 31692), (684, 27383), (788, 23769), (834, 22458), (1182, 15846), (1251, 14972), (1668, 11229), (1773, 10564), (2364, 7923), (2502, 7486), (2641, 7092), (3546, 5282), (3743, 5004)]