20686328

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{443}}^1\times {\mathrm{449}}^1$

素因数の和:911

約数の個数: 32

約数和(自身を含む): 41958000

約数和(自身を除く): 21271672

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 443, 449, 886, 898, 1772, 1796, 3544, 3592, 5759, 5837, 11518, 11674, 23036, 23348, 46072, 46696, 198907, 397814, 795628, 1591256, 2585791, 5171582, 10343164, 20686328]

約数ペア:

[(1, 20686328), (2, 10343164), (4, 5171582), (8, 2585791), (13, 1591256), (26, 795628), (52, 397814), (104, 198907), (443, 46696), (449, 46072), (886, 23348), (898, 23036), (1772, 11674), (1796, 11518), (3544, 5837), (3592, 5759)]