20740372996

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^2\times {\mathrm{83}}^1\times {\mathrm{5309}}^1$

素因数の和:5485

約数の個数: 72

約数和(自身を含む): 43037507520

約数和(自身を除く): 22297134524

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 83, 164, 166, 287, 332, 574, 581, 1148, 1162, 1681, 2324, 3362, 3403, 5309, 6724, 6806, 10618, 11767, 13612, 21236, 23534, 23821, 37163, 47068, 47642, 74326, 95284, 139523, 148652, 217669, 279046, 435338, 440647, 558092, 870676, 881294, 976661, 1523683, 1762588, 1953322, 3047366, 3084529, 3906644, 6094732, 6169058, 8924429, 12338116, 17848858, 18066527, 35697716, 36133054, 62471003, 72266108, 124942006, 126465689, 249884012, 252931378, 505862756, 740727607, 1481455214, 2962910428, 5185093249, 10370186498, 20740372996]

約数ペア:

[(1, 20740372996), (2, 10370186498), (4, 5185093249), (7, 2962910428), (14, 1481455214), (28, 740727607), (41, 505862756), (82, 252931378), (83, 249884012), (164, 126465689), (166, 124942006), (287, 72266108), (332, 62471003), (574, 36133054), (581, 35697716), (1148, 18066527), (1162, 17848858), (1681, 12338116), (2324, 8924429), (3362, 6169058), (3403, 6094732), (5309, 3906644), (6724, 3084529), (6806, 3047366), (10618, 1953322), (11767, 1762588), (13612, 1523683), (21236, 976661), (23534, 881294), (23821, 870676), (37163, 558092), (47068, 440647), (47642, 435338), (74326, 279046), (95284, 217669), (139523, 148652)]