19791891

素因数分解:

$3^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1$

素因数の和:225

約数の個数: 64

約数和(自身を含む): 36403200

約数和(自身を除く): 16611309

約数列:

[1, 3, 7, 9, 21, 23, 27, 29, 63, 69, 87, 157, 161, 189, 203, 207, 261, 471, 483, 609, 621, 667, 783, 1099, 1413, 1449, 1827, 2001, 3297, 3611, 4239, 4347, 4553, 4669, 5481, 6003, 9891, 10833, 13659, 14007, 18009, 25277, 29673, 31871, 32499, 40977, 42021, 75831, 95613, 97497, 104719, 122931, 126063, 227493, 286839, 314157, 682479, 733033, 860517, 942471, 2199099, 2827413, 6597297, 19791891]

約数ペア:

[(1, 19791891), (3, 6597297), (7, 2827413), (9, 2199099), (21, 942471), (23, 860517), (27, 733033), (29, 682479), (63, 314157), (69, 286839), (87, 227493), (157, 126063), (161, 122931), (189, 104719), (203, 97497), (207, 95613), (261, 75831), (471, 42021), (483, 40977), (609, 32499), (621, 31871), (667, 29673), (783, 25277), (1099, 18009), (1413, 14007), (1449, 13659), (1827, 10833), (2001, 9891), (3297, 6003), (3611, 5481), (4239, 4669), (4347, 4553)]