20675768

素因数分解:

$2^3\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{409}}^1$

素因数の和:575

約数の個数: 32

約数和(自身を含む): 39852000

約数和(自身を除く): 19176232

約数列:

[1, 2, 4, 8, 71, 89, 142, 178, 284, 356, 409, 568, 712, 818, 1636, 3272, 6319, 12638, 25276, 29039, 36401, 50552, 58078, 72802, 116156, 145604, 232312, 291208, 2584471, 5168942, 10337884, 20675768]

約数ペア:

[(1, 20675768), (2, 10337884), (4, 5168942), (8, 2584471), (71, 291208), (89, 232312), (142, 145604), (178, 116156), (284, 72802), (356, 58078), (409, 50552), (568, 36401), (712, 29039), (818, 25276), (1636, 12638), (3272, 6319)]