12780621

素因数分解:

$3^2\times 7^2\times {\mathrm{73}}^1\times {\mathrm{397}}^1$

素因数の和:490

約数の個数: 36

約数和(自身を含む): 21823932

約数和(自身を除く): 9043311

約数列:

[1, 3, 7, 9, 21, 49, 63, 73, 147, 219, 397, 441, 511, 657, 1191, 1533, 2779, 3573, 3577, 4599, 8337, 10731, 19453, 25011, 28981, 32193, 58359, 86943, 175077, 202867, 260829, 608601, 1420069, 1825803, 4260207, 12780621]

約数ペア:

[(1, 12780621), (3, 4260207), (7, 1825803), (9, 1420069), (21, 608601), (49, 260829), (63, 202867), (73, 175077), (147, 86943), (219, 58359), (397, 32193), (441, 28981), (511, 25011), (657, 19453), (1191, 10731), (1533, 8337), (2779, 4599), (3573, 3577)]