21778020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{647}}^1$

素因数の和:690

約数の個数: 144

約数和(自身を含む): 76422528

約数和(自身を除く): 54644508

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 17, 18, 20, 22, 30, 33, 34, 36, 44, 45, 51, 55, 60, 66, 68, 85, 90, 99, 102, 110, 132, 153, 165, 170, 180, 187, 198, 204, 220, 255, 306, 330, 340, 374, 396, 495, 510, 561, 612, 647, 660, 748, 765, 935, 990, 1020, 1122, 1294, 1530, 1683, 1870, 1941, 1980, 2244, 2588, 2805, 3060, 3235, 3366, 3740, 3882, 5610, 5823, 6470, 6732, 7117, 7764, 8415, 9705, 10999, 11220, 11646, 12940, 14234, 16830, 19410, 21351, 21998, 23292, 28468, 29115, 32997, 33660, 35585, 38820, 42702, 43996, 54995, 58230, 64053, 65994, 71170, 85404, 98991, 106755, 109990, 116460, 120989, 128106, 131988, 142340, 164985, 197982, 213510, 219980, 241978, 256212, 320265, 329970, 362967, 395964, 427020, 483956, 494955, 604945, 640530, 659940, 725934, 989910, 1088901, 1209890, 1281060, 1451868, 1814835, 1979820, 2177802, 2419780, 3629670, 4355604, 5444505, 7259340, 10889010, 21778020]

約数ペア:

[(1, 21778020), (2, 10889010), (3, 7259340), (4, 5444505), (5, 4355604), (6, 3629670), (9, 2419780), (10, 2177802), (11, 1979820), (12, 1814835), (15, 1451868), (17, 1281060), (18, 1209890), (20, 1088901), (22, 989910), (30, 725934), (33, 659940), (34, 640530), (36, 604945), (44, 494955), (45, 483956), (51, 427020), (55, 395964), (60, 362967), (66, 329970), (68, 320265), (85, 256212), (90, 241978), (99, 219980), (102, 213510), (110, 197982), (132, 164985), (153, 142340), (165, 131988), (170, 128106), (180, 120989), (187, 116460), (198, 109990), (204, 106755), (220, 98991), (255, 85404), (306, 71170), (330, 65994), (340, 64053), (374, 58230), (396, 54995), (495, 43996), (510, 42702), (561, 38820), (612, 35585), (647, 33660), (660, 32997), (748, 29115), (765, 28468), (935, 23292), (990, 21998), (1020, 21351), (1122, 19410), (1294, 16830), (1530, 14234), (1683, 12940), (1870, 11646), (1941, 11220), (1980, 10999), (2244, 9705), (2588, 8415), (2805, 7764), (3060, 7117), (3235, 6732), (3366, 6470), (3740, 5823), (3882, 5610)]