20688840

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{569}}^1$

素因数の和:687

約数の個数: 96

約数和(自身を含む): 68023800

約数和(自身を除く): 47334960

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 101, 120, 180, 202, 303, 360, 404, 505, 569, 606, 808, 909, 1010, 1138, 1212, 1515, 1707, 1818, 2020, 2276, 2424, 2845, 3030, 3414, 3636, 4040, 4545, 4552, 5121, 5690, 6060, 6828, 7272, 8535, 9090, 10242, 11380, 12120, 13656, 17070, 18180, 20484, 22760, 25605, 34140, 36360, 40968, 51210, 57469, 68280, 102420, 114938, 172407, 204840, 229876, 287345, 344814, 459752, 517221, 574690, 689628, 862035, 1034442, 1149380, 1379256, 1724070, 2068884, 2298760, 2586105, 3448140, 4137768, 5172210, 6896280, 10344420, 20688840]

約数ペア:

[(1, 20688840), (2, 10344420), (3, 6896280), (4, 5172210), (5, 4137768), (6, 3448140), (8, 2586105), (9, 2298760), (10, 2068884), (12, 1724070), (15, 1379256), (18, 1149380), (20, 1034442), (24, 862035), (30, 689628), (36, 574690), (40, 517221), (45, 459752), (60, 344814), (72, 287345), (90, 229876), (101, 204840), (120, 172407), (180, 114938), (202, 102420), (303, 68280), (360, 57469), (404, 51210), (505, 40968), (569, 36360), (606, 34140), (808, 25605), (909, 22760), (1010, 20484), (1138, 18180), (1212, 17070), (1515, 13656), (1707, 12120), (1818, 11380), (2020, 10242), (2276, 9090), (2424, 8535), (2845, 7272), (3030, 6828), (3414, 6060), (3636, 5690), (4040, 5121), (4545, 4552)]