20458755

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 36996960

約数和(自身を除く): 16538205

約数列:

[1, 3, 5, 9, 15, 43, 45, 97, 109, 129, 215, 291, 327, 387, 485, 545, 645, 873, 981, 1455, 1635, 1935, 4171, 4365, 4687, 4905, 10573, 12513, 14061, 20855, 23435, 31719, 37539, 42183, 52865, 62565, 70305, 95157, 158595, 187695, 210915, 454639, 475785, 1363917, 2273195, 4091751, 6819585, 20458755]

約数ペア:

[(1, 20458755), (3, 6819585), (5, 4091751), (9, 2273195), (15, 1363917), (43, 475785), (45, 454639), (97, 210915), (109, 187695), (129, 158595), (215, 95157), (291, 70305), (327, 62565), (387, 52865), (485, 42183), (545, 37539), (645, 31719), (873, 23435), (981, 20855), (1455, 14061), (1635, 12513), (1935, 10573), (4171, 4905), (4365, 4687)]