20841455

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:191

約数の個数: 32

約数和(自身を含む): 27371520

約数和(自身を除く): 6530065

約数列:

[1, 5, 31, 43, 53, 59, 155, 215, 265, 295, 1333, 1643, 1829, 2279, 2537, 3127, 6665, 8215, 9145, 11395, 12685, 15635, 70649, 78647, 96937, 134461, 353245, 393235, 484685, 672305, 4168291, 20841455]

約数ペア:

[(1, 20841455), (5, 4168291), (31, 672305), (43, 484685), (53, 393235), (59, 353245), (155, 134461), (215, 96937), (265, 78647), (295, 70649), (1333, 15635), (1643, 12685), (1829, 11395), (2279, 9145), (2537, 8215), (3127, 6665)]