18688257

素因数分解:

$3^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{1367}}^1$

素因数の和:1418

約数の個数: 36

約数和(自身を含む): 32438016

約数和(自身を除く): 13749759

約数列:

[1, 3, 7, 9, 21, 31, 49, 63, 93, 147, 217, 279, 441, 651, 1367, 1519, 1953, 4101, 4557, 9569, 12303, 13671, 28707, 42377, 66983, 86121, 127131, 200949, 296639, 381393, 602847, 889917, 2076473, 2669751, 6229419, 18688257]

約数ペア:

[(1, 18688257), (3, 6229419), (7, 2669751), (9, 2076473), (21, 889917), (31, 602847), (49, 381393), (63, 296639), (93, 200949), (147, 127131), (217, 86121), (279, 66983), (441, 42377), (651, 28707), (1367, 13671), (1519, 12303), (1953, 9569), (4101, 4557)]