78807680

素因数分解:

$2^7\times 5^1\times 7^3\times {\mathrm{359}}^1$

素因数の和:399

約数の個数: 128

約数和(自身を含む): 220320000

約数和(自身を除く): 141512320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 128, 140, 160, 196, 224, 245, 280, 320, 343, 359, 392, 448, 490, 560, 640, 686, 718, 784, 896, 980, 1120, 1372, 1436, 1568, 1715, 1795, 1960, 2240, 2513, 2744, 2872, 3136, 3430, 3590, 3920, 4480, 5026, 5488, 5744, 6272, 6860, 7180, 7840, 10052, 10976, 11488, 12565, 13720, 14360, 15680, 17591, 20104, 21952, 22976, 25130, 27440, 28720, 31360, 35182, 40208, 43904, 45952, 50260, 54880, 57440, 70364, 80416, 87955, 100520, 109760, 114880, 123137, 140728, 160832, 175910, 201040, 219520, 229760, 246274, 281456, 321664, 351820, 402080, 492548, 562912, 615685, 703640, 804160, 985096, 1125824, 1231370, 1407280, 1608320, 1970192, 2251648, 2462740, 2814560, 3940384, 4925480, 5629120, 7880768, 9850960, 11258240, 15761536, 19701920, 39403840, 78807680]

約数ペア:

[(1, 78807680), (2, 39403840), (4, 19701920), (5, 15761536), (7, 11258240), (8, 9850960), (10, 7880768), (14, 5629120), (16, 4925480), (20, 3940384), (28, 2814560), (32, 2462740), (35, 2251648), (40, 1970192), (49, 1608320), (56, 1407280), (64, 1231370), (70, 1125824), (80, 985096), (98, 804160), (112, 703640), (128, 615685), (140, 562912), (160, 492548), (196, 402080), (224, 351820), (245, 321664), (280, 281456), (320, 246274), (343, 229760), (359, 219520), (392, 201040), (448, 175910), (490, 160832), (560, 140728), (640, 123137), (686, 114880), (718, 109760), (784, 100520), (896, 87955), (980, 80416), (1120, 70364), (1372, 57440), (1436, 54880), (1568, 50260), (1715, 45952), (1795, 43904), (1960, 40208), (2240, 35182), (2513, 31360), (2744, 28720), (2872, 27440), (3136, 25130), (3430, 22976), (3590, 21952), (3920, 20104), (4480, 17591), (5026, 15680), (5488, 14360), (5744, 13720), (6272, 12565), (6860, 11488), (7180, 10976), (7840, 10052)]