21550788

素因数分解:

$2^2\times 3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{643}}^1$

素因数の和:686

約数の個数: 108

約数和(自身を含む): 66808560

約数和(自身を除く): 45257772

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 19, 21, 28, 36, 38, 42, 49, 57, 63, 76, 84, 98, 114, 126, 133, 147, 171, 196, 228, 252, 266, 294, 342, 399, 441, 532, 588, 643, 684, 798, 882, 931, 1197, 1286, 1596, 1764, 1862, 1929, 2394, 2572, 2793, 3724, 3858, 4501, 4788, 5586, 5787, 7716, 8379, 9002, 11172, 11574, 12217, 13503, 16758, 18004, 23148, 24434, 27006, 31507, 33516, 36651, 40509, 48868, 54012, 63014, 73302, 81018, 85519, 94521, 109953, 126028, 146604, 162036, 171038, 189042, 219906, 256557, 283563, 342076, 378084, 439812, 513114, 567126, 598633, 769671, 1026228, 1134252, 1197266, 1539342, 1795899, 2394532, 3078684, 3591798, 5387697, 7183596, 10775394, 21550788]

約数ペア:

[(1, 21550788), (2, 10775394), (3, 7183596), (4, 5387697), (6, 3591798), (7, 3078684), (9, 2394532), (12, 1795899), (14, 1539342), (18, 1197266), (19, 1134252), (21, 1026228), (28, 769671), (36, 598633), (38, 567126), (42, 513114), (49, 439812), (57, 378084), (63, 342076), (76, 283563), (84, 256557), (98, 219906), (114, 189042), (126, 171038), (133, 162036), (147, 146604), (171, 126028), (196, 109953), (228, 94521), (252, 85519), (266, 81018), (294, 73302), (342, 63014), (399, 54012), (441, 48868), (532, 40509), (588, 36651), (643, 33516), (684, 31507), (798, 27006), (882, 24434), (931, 23148), (1197, 18004), (1286, 16758), (1596, 13503), (1764, 12217), (1862, 11574), (1929, 11172), (2394, 9002), (2572, 8379), (2793, 7716), (3724, 5787), (3858, 5586), (4501, 4788)]