19211775

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{73}}^1$

素因数の和:137

約数の個数: 72

約数和(自身を含む): 36612240

約数和(自身を除く): 17400465

約数列:

[1, 3, 5, 11, 15, 25, 29, 33, 55, 73, 75, 87, 121, 145, 165, 219, 275, 319, 363, 365, 435, 605, 725, 803, 825, 957, 1095, 1595, 1815, 1825, 2117, 2175, 2409, 3025, 3509, 4015, 4785, 5475, 6351, 7975, 8833, 9075, 10527, 10585, 12045, 17545, 20075, 23287, 23925, 26499, 31755, 44165, 52635, 52925, 60225, 69861, 87725, 116435, 132495, 158775, 220825, 256157, 263175, 349305, 582175, 662475, 768471, 1280785, 1746525, 3842355, 6403925, 19211775]

約数ペア:

[(1, 19211775), (3, 6403925), (5, 3842355), (11, 1746525), (15, 1280785), (25, 768471), (29, 662475), (33, 582175), (55, 349305), (73, 263175), (75, 256157), (87, 220825), (121, 158775), (145, 132495), (165, 116435), (219, 87725), (275, 69861), (319, 60225), (363, 52925), (365, 52635), (435, 44165), (605, 31755), (725, 26499), (803, 23925), (825, 23287), (957, 20075), (1095, 17545), (1595, 12045), (1815, 10585), (1825, 10527), (2117, 9075), (2175, 8833), (2409, 7975), (3025, 6351), (3509, 5475), (4015, 4785)]