20681128

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{4231}}^1$

素因数の和:4297

約数の個数: 32

約数和(自身を含む): 42658560

約数和(自身を除く): 21977432

約数列:

[1, 2, 4, 8, 13, 26, 47, 52, 94, 104, 188, 376, 611, 1222, 2444, 4231, 4888, 8462, 16924, 33848, 55003, 110006, 198857, 220012, 397714, 440024, 795428, 1590856, 2585141, 5170282, 10340564, 20681128]

約数ペア:

[(1, 20681128), (2, 10340564), (4, 5170282), (8, 2585141), (13, 1590856), (26, 795428), (47, 440024), (52, 397714), (94, 220012), (104, 198857), (188, 110006), (376, 55003), (611, 33848), (1222, 16924), (2444, 8462), (4231, 4888)]