21176815

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:144

約数の個数: 48

約数和(自身を含む): 31026240

約数和(自身を除く): 9849425

約数列:

[1, 5, 11, 17, 29, 55, 71, 85, 121, 145, 187, 319, 355, 493, 605, 781, 935, 1207, 1595, 2057, 2059, 2465, 3509, 3905, 5423, 6035, 8591, 10285, 10295, 13277, 17545, 22649, 27115, 35003, 42955, 59653, 66385, 113245, 146047, 175015, 249139, 298265, 385033, 730235, 1245695, 1925165, 4235363, 21176815]

約数ペア:

[(1, 21176815), (5, 4235363), (11, 1925165), (17, 1245695), (29, 730235), (55, 385033), (71, 298265), (85, 249139), (121, 175015), (145, 146047), (187, 113245), (319, 66385), (355, 59653), (493, 42955), (605, 35003), (781, 27115), (935, 22649), (1207, 17545), (1595, 13277), (2057, 10295), (2059, 10285), (2465, 8591), (3509, 6035), (3905, 5423)]