21009618

素因数分解:

$2^1\times 3^4\times 7^1\times {\mathrm{97}}^1\times {\mathrm{191}}^1$

素因数の和:309

約数の個数: 80

約数和(自身を含む): 54641664

約数和(自身を除く): 33632046

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 81, 97, 126, 162, 189, 191, 194, 291, 378, 382, 567, 573, 582, 679, 873, 1134, 1146, 1337, 1358, 1719, 1746, 2037, 2619, 2674, 3438, 4011, 4074, 5157, 5238, 6111, 7857, 8022, 10314, 12033, 12222, 15471, 15714, 18333, 18527, 24066, 30942, 36099, 36666, 37054, 54999, 55581, 72198, 108297, 109998, 111162, 129689, 166743, 216594, 259378, 333486, 389067, 500229, 778134, 1000458, 1167201, 1500687, 2334402, 3001374, 3501603, 7003206, 10504809, 21009618]

約数ペア:

[(1, 21009618), (2, 10504809), (3, 7003206), (6, 3501603), (7, 3001374), (9, 2334402), (14, 1500687), (18, 1167201), (21, 1000458), (27, 778134), (42, 500229), (54, 389067), (63, 333486), (81, 259378), (97, 216594), (126, 166743), (162, 129689), (189, 111162), (191, 109998), (194, 108297), (291, 72198), (378, 55581), (382, 54999), (567, 37054), (573, 36666), (582, 36099), (679, 30942), (873, 24066), (1134, 18527), (1146, 18333), (1337, 15714), (1358, 15471), (1719, 12222), (1746, 12033), (2037, 10314), (2619, 8022), (2674, 7857), (3438, 6111), (4011, 5238), (4074, 5157)]