81720180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4243}}^1$

素因数の和:4365

約数の個数: 72

約数和(自身を含む): 250260192

約数和(自身を除く): 168540012

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 107, 180, 214, 321, 428, 535, 642, 963, 1070, 1284, 1605, 1926, 2140, 3210, 3852, 4243, 4815, 6420, 8486, 9630, 12729, 16972, 19260, 21215, 25458, 38187, 42430, 50916, 63645, 76374, 84860, 127290, 152748, 190935, 254580, 381870, 454001, 763740, 908002, 1362003, 1816004, 2270005, 2724006, 4086009, 4540010, 5448012, 6810015, 8172018, 9080020, 13620030, 16344036, 20430045, 27240060, 40860090, 81720180]

約数ペア:

[(1, 81720180), (2, 40860090), (3, 27240060), (4, 20430045), (5, 16344036), (6, 13620030), (9, 9080020), (10, 8172018), (12, 6810015), (15, 5448012), (18, 4540010), (20, 4086009), (30, 2724006), (36, 2270005), (45, 1816004), (60, 1362003), (90, 908002), (107, 763740), (180, 454001), (214, 381870), (321, 254580), (428, 190935), (535, 152748), (642, 127290), (963, 84860), (1070, 76374), (1284, 63645), (1605, 50916), (1926, 42430), (2140, 38187), (3210, 25458), (3852, 21215), (4243, 19260), (4815, 16972), (6420, 12729), (8486, 9630)]