21039872

素因数分解:

$2^8\times 7^1\times {\mathrm{59}}^1\times {\mathrm{199}}^1$

素因数の和:281

約数の個数: 72

約数和(自身を含む): 49056000

約数和(自身を除く): 28016128

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 59, 64, 112, 118, 128, 199, 224, 236, 256, 398, 413, 448, 472, 796, 826, 896, 944, 1393, 1592, 1652, 1792, 1888, 2786, 3184, 3304, 3776, 5572, 6368, 6608, 7552, 11144, 11741, 12736, 13216, 15104, 22288, 23482, 25472, 26432, 44576, 46964, 50944, 52864, 82187, 89152, 93928, 105728, 164374, 178304, 187856, 328748, 356608, 375712, 657496, 751424, 1314992, 1502848, 2629984, 3005696, 5259968, 10519936, 21039872]

約数ペア:

[(1, 21039872), (2, 10519936), (4, 5259968), (7, 3005696), (8, 2629984), (14, 1502848), (16, 1314992), (28, 751424), (32, 657496), (56, 375712), (59, 356608), (64, 328748), (112, 187856), (118, 178304), (128, 164374), (199, 105728), (224, 93928), (236, 89152), (256, 82187), (398, 52864), (413, 50944), (448, 46964), (472, 44576), (796, 26432), (826, 25472), (896, 23482), (944, 22288), (1393, 15104), (1592, 13216), (1652, 12736), (1792, 11741), (1888, 11144), (2786, 7552), (3184, 6608), (3304, 6368), (3776, 5572)]