21200465

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{199}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 30240000

約数和(自身を除く): 9039535

約数列:

[1, 5, 11, 13, 55, 65, 143, 149, 199, 715, 745, 995, 1639, 1937, 2189, 2587, 8195, 9685, 10945, 12935, 21307, 28457, 29651, 106535, 142285, 148255, 326161, 385463, 1630805, 1927315, 4240093, 21200465]

約数ペア:

[(1, 21200465), (5, 4240093), (11, 1927315), (13, 1630805), (55, 385463), (65, 326161), (143, 148255), (149, 142285), (199, 106535), (715, 29651), (745, 28457), (995, 21307), (1639, 12935), (1937, 10945), (2189, 9685), (2587, 8195)]