21551985

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{277}}^1$

素因数の和:327

約数の個数: 96

約数和(自身を含む): 48572160

約数和(自身を除く): 27020175

約数列:

[1, 3, 5, 7, 9, 13, 15, 19, 21, 35, 39, 45, 57, 63, 65, 91, 95, 105, 117, 133, 171, 195, 247, 273, 277, 285, 315, 399, 455, 585, 665, 741, 819, 831, 855, 1197, 1235, 1365, 1385, 1729, 1939, 1995, 2223, 2493, 3601, 3705, 4095, 4155, 5187, 5263, 5817, 5985, 8645, 9695, 10803, 11115, 12465, 15561, 15789, 17451, 18005, 25207, 25935, 26315, 29085, 32409, 36841, 47367, 54015, 68419, 75621, 77805, 78945, 87255, 110523, 126035, 162045, 184205, 205257, 226863, 236835, 331569, 342095, 378105, 478933, 552615, 615771, 1026285, 1134315, 1436799, 1657845, 2394665, 3078855, 4310397, 7183995, 21551985]

約数ペア:

[(1, 21551985), (3, 7183995), (5, 4310397), (7, 3078855), (9, 2394665), (13, 1657845), (15, 1436799), (19, 1134315), (21, 1026285), (35, 615771), (39, 552615), (45, 478933), (57, 378105), (63, 342095), (65, 331569), (91, 236835), (95, 226863), (105, 205257), (117, 184205), (133, 162045), (171, 126035), (195, 110523), (247, 87255), (273, 78945), (277, 77805), (285, 75621), (315, 68419), (399, 54015), (455, 47367), (585, 36841), (665, 32409), (741, 29085), (819, 26315), (831, 25935), (855, 25207), (1197, 18005), (1235, 17451), (1365, 15789), (1385, 15561), (1729, 12465), (1939, 11115), (1995, 10803), (2223, 9695), (2493, 8645), (3601, 5985), (3705, 5817), (4095, 5263), (4155, 5187)]