21540105

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{761}}^1$

素因数の和:826

約数の個数: 48

約数和(自身を含む): 40654224

約数和(自身を除く): 19114119

約数列:

[1, 3, 5, 9, 15, 17, 37, 45, 51, 85, 111, 153, 185, 255, 333, 555, 629, 761, 765, 1665, 1887, 2283, 3145, 3805, 5661, 6849, 9435, 11415, 12937, 28157, 28305, 34245, 38811, 64685, 84471, 116433, 140785, 194055, 253413, 422355, 478669, 582165, 1267065, 1436007, 2393345, 4308021, 7180035, 21540105]

約数ペア:

[(1, 21540105), (3, 7180035), (5, 4308021), (9, 2393345), (15, 1436007), (17, 1267065), (37, 582165), (45, 478669), (51, 422355), (85, 253413), (111, 194055), (153, 140785), (185, 116433), (255, 84471), (333, 64685), (555, 38811), (629, 34245), (761, 28305), (765, 28157), (1665, 12937), (1887, 11415), (2283, 9435), (3145, 6849), (3805, 5661)]