21168028

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{199}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 44352000

約数和(自身を除く): 23183972

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 116, 131, 199, 203, 262, 398, 406, 524, 796, 812, 917, 1393, 1834, 2786, 3668, 3799, 5572, 5771, 7598, 11542, 15196, 23084, 26069, 26593, 40397, 52138, 53186, 80794, 104276, 106372, 161588, 182483, 364966, 729932, 756001, 1512002, 3024004, 5292007, 10584014, 21168028]

約数ペア:

[(1, 21168028), (2, 10584014), (4, 5292007), (7, 3024004), (14, 1512002), (28, 756001), (29, 729932), (58, 364966), (116, 182483), (131, 161588), (199, 106372), (203, 104276), (262, 80794), (398, 53186), (406, 52138), (524, 40397), (796, 26593), (812, 26069), (917, 23084), (1393, 15196), (1834, 11542), (2786, 7598), (3668, 5771), (3799, 5572)]