21752720

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1301}}^1$

素因数の和:1344

約数の個数: 80

約数和(自身を含む): 58121280

約数和(自身を除く): 36368560

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 38, 40, 44, 55, 76, 80, 88, 95, 110, 152, 176, 190, 209, 220, 304, 380, 418, 440, 760, 836, 880, 1045, 1301, 1520, 1672, 2090, 2602, 3344, 4180, 5204, 6505, 8360, 10408, 13010, 14311, 16720, 20816, 24719, 26020, 28622, 49438, 52040, 57244, 71555, 98876, 104080, 114488, 123595, 143110, 197752, 228976, 247190, 271909, 286220, 395504, 494380, 543818, 572440, 988760, 1087636, 1144880, 1359545, 1977520, 2175272, 2719090, 4350544, 5438180, 10876360, 21752720]

約数ペア:

[(1, 21752720), (2, 10876360), (4, 5438180), (5, 4350544), (8, 2719090), (10, 2175272), (11, 1977520), (16, 1359545), (19, 1144880), (20, 1087636), (22, 988760), (38, 572440), (40, 543818), (44, 494380), (55, 395504), (76, 286220), (80, 271909), (88, 247190), (95, 228976), (110, 197752), (152, 143110), (176, 123595), (190, 114488), (209, 104080), (220, 98876), (304, 71555), (380, 57244), (418, 52040), (440, 49438), (760, 28622), (836, 26020), (880, 24719), (1045, 20816), (1301, 16720), (1520, 14311), (1672, 13010), (2090, 10408), (2602, 8360), (3344, 6505), (4180, 5204)]