21867005

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 29082240

約数和(自身を除く): 7215235

約数列:

[1, 5, 19, 43, 53, 95, 101, 215, 265, 505, 817, 1007, 1919, 2279, 4085, 4343, 5035, 5353, 9595, 11395, 21715, 26765, 43301, 82517, 101707, 216505, 230179, 412585, 508535, 1150895, 4373401, 21867005]

約数ペア:

[(1, 21867005), (5, 4373401), (19, 1150895), (43, 508535), (53, 412585), (95, 230179), (101, 216505), (215, 101707), (265, 82517), (505, 43301), (817, 26765), (1007, 21715), (1919, 11395), (2279, 9595), (4085, 5353), (4343, 5035)]