19803840

素因数分解:

$2^6\times 3^1\times 5^1\times 7^2\times {\mathrm{421}}^1$

素因数の和:455

約数の個数: 168

約数和(自身を含む): 73316592

約数和(自身を除く): 53512752

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 49, 56, 60, 64, 70, 80, 84, 96, 98, 105, 112, 120, 140, 147, 160, 168, 192, 196, 210, 224, 240, 245, 280, 294, 320, 336, 392, 420, 421, 448, 480, 490, 560, 588, 672, 735, 784, 840, 842, 960, 980, 1120, 1176, 1263, 1344, 1470, 1568, 1680, 1684, 1960, 2105, 2240, 2352, 2526, 2940, 2947, 3136, 3360, 3368, 3920, 4210, 4704, 5052, 5880, 5894, 6315, 6720, 6736, 7840, 8420, 8841, 9408, 10104, 11760, 11788, 12630, 13472, 14735, 15680, 16840, 17682, 20208, 20629, 23520, 23576, 25260, 26944, 29470, 33680, 35364, 40416, 41258, 44205, 47040, 47152, 50520, 58940, 61887, 67360, 70728, 80832, 82516, 88410, 94304, 101040, 103145, 117880, 123774, 134720, 141456, 165032, 176820, 188608, 202080, 206290, 235760, 247548, 282912, 309435, 330064, 353640, 404160, 412580, 471520, 495096, 565824, 618870, 660128, 707280, 825160, 943040, 990192, 1237740, 1320256, 1414560, 1650320, 1980384, 2475480, 2829120, 3300640, 3960768, 4950960, 6601280, 9901920, 19803840]

約数ペア:

[(1, 19803840), (2, 9901920), (3, 6601280), (4, 4950960), (5, 3960768), (6, 3300640), (7, 2829120), (8, 2475480), (10, 1980384), (12, 1650320), (14, 1414560), (15, 1320256), (16, 1237740), (20, 990192), (21, 943040), (24, 825160), (28, 707280), (30, 660128), (32, 618870), (35, 565824), (40, 495096), (42, 471520), (48, 412580), (49, 404160), (56, 353640), (60, 330064), (64, 309435), (70, 282912), (80, 247548), (84, 235760), (96, 206290), (98, 202080), (105, 188608), (112, 176820), (120, 165032), (140, 141456), (147, 134720), (160, 123774), (168, 117880), (192, 103145), (196, 101040), (210, 94304), (224, 88410), (240, 82516), (245, 80832), (280, 70728), (294, 67360), (320, 61887), (336, 58940), (392, 50520), (420, 47152), (421, 47040), (448, 44205), (480, 41258), (490, 40416), (560, 35364), (588, 33680), (672, 29470), (735, 26944), (784, 25260), (840, 23576), (842, 23520), (960, 20629), (980, 20208), (1120, 17682), (1176, 16840), (1263, 15680), (1344, 14735), (1470, 13472), (1568, 12630), (1680, 11788), (1684, 11760), (1960, 10104), (2105, 9408), (2240, 8841), (2352, 8420), (2526, 7840), (2940, 6736), (2947, 6720), (3136, 6315), (3360, 5894), (3368, 5880), (3920, 5052), (4210, 4704)]