18639747

素因数分解:

$3^3\times 7^2\times {\mathrm{73}}^1\times {\mathrm{193}}^1$

素因数の和:289

約数の個数: 48

約数和(自身を含む): 32731680

約数和(自身を除く): 14091933

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 73, 147, 189, 193, 219, 441, 511, 579, 657, 1323, 1351, 1533, 1737, 1971, 3577, 4053, 4599, 5211, 9457, 10731, 12159, 13797, 14089, 28371, 32193, 36477, 42267, 85113, 96579, 98623, 126801, 255339, 295869, 380403, 690361, 887607, 2071083, 2662821, 6213249, 18639747]

約数ペア:

[(1, 18639747), (3, 6213249), (7, 2662821), (9, 2071083), (21, 887607), (27, 690361), (49, 380403), (63, 295869), (73, 255339), (147, 126801), (189, 98623), (193, 96579), (219, 85113), (441, 42267), (511, 36477), (579, 32193), (657, 28371), (1323, 14089), (1351, 13797), (1533, 12159), (1737, 10731), (1971, 9457), (3577, 5211), (4053, 4599)]