20120945

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:305

約数の個数: 32

約数和(自身を含む): 27941760

約数和(自身を除く): 7820815

約数列:

[1, 5, 13, 17, 65, 85, 131, 139, 221, 655, 695, 1105, 1703, 1807, 2227, 2363, 8515, 9035, 11135, 11815, 18209, 28951, 30719, 91045, 144755, 153595, 236717, 309553, 1183585, 1547765, 4024189, 20120945]

約数ペア:

[(1, 20120945), (5, 4024189), (13, 1547765), (17, 1183585), (65, 309553), (85, 236717), (131, 153595), (139, 144755), (221, 91045), (655, 30719), (695, 28951), (1105, 18209), (1703, 11815), (1807, 11135), (2227, 9035), (2363, 8515)]