20481547600

素因数分解:

$2^4\times 5^2\times {\mathrm{101}}^1\times {\mathrm{397}}^1\times {\mathrm{1277}}^1$

素因数の和:1793

約数の個数: 120

約数和(自身を含む): 49858302168

約数和(自身を除く): 29376754568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 101, 200, 202, 397, 400, 404, 505, 794, 808, 1010, 1277, 1588, 1616, 1985, 2020, 2525, 2554, 3176, 3970, 4040, 5050, 5108, 6352, 6385, 7940, 8080, 9925, 10100, 10216, 12770, 15880, 19850, 20200, 20432, 25540, 31760, 31925, 39700, 40097, 40400, 51080, 63850, 79400, 80194, 102160, 127700, 128977, 158800, 160388, 200485, 255400, 257954, 320776, 400970, 506969, 510800, 515908, 641552, 644885, 801940, 1002425, 1013938, 1031816, 1289770, 1603880, 2004850, 2027876, 2063632, 2534845, 2579540, 3207760, 3224425, 4009700, 4055752, 5069690, 5159080, 6448850, 8019400, 8111504, 10139380, 10318160, 12674225, 12897700, 16038800, 20278760, 25348450, 25795400, 40557520, 50696900, 51203869, 51590800, 101393800, 102407738, 202787600, 204815476, 256019345, 409630952, 512038690, 819261904, 1024077380, 1280096725, 2048154760, 2560193450, 4096309520, 5120386900, 10240773800, 20481547600]

約数ペア:

[(1, 20481547600), (2, 10240773800), (4, 5120386900), (5, 4096309520), (8, 2560193450), (10, 2048154760), (16, 1280096725), (20, 1024077380), (25, 819261904), (40, 512038690), (50, 409630952), (80, 256019345), (100, 204815476), (101, 202787600), (200, 102407738), (202, 101393800), (397, 51590800), (400, 51203869), (404, 50696900), (505, 40557520), (794, 25795400), (808, 25348450), (1010, 20278760), (1277, 16038800), (1588, 12897700), (1616, 12674225), (1985, 10318160), (2020, 10139380), (2525, 8111504), (2554, 8019400), (3176, 6448850), (3970, 5159080), (4040, 5069690), (5050, 4055752), (5108, 4009700), (6352, 3224425), (6385, 3207760), (7940, 2579540), (8080, 2534845), (9925, 2063632), (10100, 2027876), (10216, 2004850), (12770, 1603880), (15880, 1289770), (19850, 1031816), (20200, 1013938), (20432, 1002425), (25540, 801940), (31760, 644885), (31925, 641552), (39700, 515908), (40097, 510800), (40400, 506969), (51080, 400970), (63850, 320776), (79400, 257954), (80194, 255400), (102160, 200485), (127700, 160388), (128977, 158800)]