21781045

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{743}}^1$

素因数の和:813

約数の個数: 32

約数和(自身を含む): 31497984

約数和(自身を除く): 9716939

約数列:

[1, 5, 11, 13, 41, 55, 65, 143, 205, 451, 533, 715, 743, 2255, 2665, 3715, 5863, 8173, 9659, 29315, 30463, 40865, 48295, 106249, 152315, 335093, 396019, 531245, 1675465, 1980095, 4356209, 21781045]

約数ペア:

[(1, 21781045), (5, 4356209), (11, 1980095), (13, 1675465), (41, 531245), (55, 396019), (65, 335093), (143, 152315), (205, 106249), (451, 48295), (533, 40865), (715, 30463), (743, 29315), (2255, 9659), (2665, 8173), (3715, 5863)]