20990658

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{8681}}^1$

素因数の和:8730

約数の個数: 32

約数和(自身を含む): 46674432

約数和(自身を除く): 25683774

約数列:

[1, 2, 3, 6, 13, 26, 31, 39, 62, 78, 93, 186, 403, 806, 1209, 2418, 8681, 17362, 26043, 52086, 112853, 225706, 269111, 338559, 538222, 677118, 807333, 1614666, 3498443, 6996886, 10495329, 20990658]

約数ペア:

[(1, 20990658), (2, 10495329), (3, 6996886), (6, 3498443), (13, 1614666), (26, 807333), (31, 677118), (39, 538222), (62, 338559), (78, 269111), (93, 225706), (186, 112853), (403, 52086), (806, 26043), (1209, 17362), (2418, 8681)]