1990391788

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{991}}^1\times {\mathrm{6521}}^1$

素因数の和:7534

約数の個数: 48

約数和(自身を含む): 4347721728

約数和(自身を除く): 2357329940

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 308, 991, 1982, 3964, 6521, 6937, 10901, 13042, 13874, 21802, 26084, 27748, 43604, 45647, 71731, 76307, 91294, 143462, 152614, 182588, 286924, 305228, 502117, 1004234, 2008468, 6462311, 12924622, 25849244, 45236177, 71085421, 90472354, 142170842, 180944708, 284341684, 497597947, 995195894, 1990391788]

約数ペア:

[(1, 1990391788), (2, 995195894), (4, 497597947), (7, 284341684), (11, 180944708), (14, 142170842), (22, 90472354), (28, 71085421), (44, 45236177), (77, 25849244), (154, 12924622), (308, 6462311), (991, 2008468), (1982, 1004234), (3964, 502117), (6521, 305228), (6937, 286924), (10901, 182588), (13042, 152614), (13874, 143462), (21802, 91294), (26084, 76307), (27748, 71731), (43604, 45647)]