21011256

素因数分解:

$2^3\times 3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{887}}^1$

素因数の和:953

約数の個数: 96

約数和(自身を含む): 66493440

約数和(自身を除く): 45482184

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 24, 28, 36, 42, 47, 56, 63, 72, 84, 94, 126, 141, 168, 188, 252, 282, 329, 376, 423, 504, 564, 658, 846, 887, 987, 1128, 1316, 1692, 1774, 1974, 2632, 2661, 2961, 3384, 3548, 3948, 5322, 5922, 6209, 7096, 7896, 7983, 10644, 11844, 12418, 15966, 18627, 21288, 23688, 24836, 31932, 37254, 41689, 49672, 55881, 63864, 74508, 83378, 111762, 125067, 149016, 166756, 223524, 250134, 291823, 333512, 375201, 447048, 500268, 583646, 750402, 875469, 1000536, 1167292, 1500804, 1750938, 2334584, 2626407, 3001608, 3501876, 5252814, 7003752, 10505628, 21011256]

約数ペア:

[(1, 21011256), (2, 10505628), (3, 7003752), (4, 5252814), (6, 3501876), (7, 3001608), (8, 2626407), (9, 2334584), (12, 1750938), (14, 1500804), (18, 1167292), (21, 1000536), (24, 875469), (28, 750402), (36, 583646), (42, 500268), (47, 447048), (56, 375201), (63, 333512), (72, 291823), (84, 250134), (94, 223524), (126, 166756), (141, 149016), (168, 125067), (188, 111762), (252, 83378), (282, 74508), (329, 63864), (376, 55881), (423, 49672), (504, 41689), (564, 37254), (658, 31932), (846, 24836), (887, 23688), (987, 21288), (1128, 18627), (1316, 15966), (1692, 12418), (1774, 11844), (1974, 10644), (2632, 7983), (2661, 7896), (2961, 7096), (3384, 6209), (3548, 5922), (3948, 5322)]