80657920

素因数分解:

$2^9\times 5^1\times 7^2\times {\mathrm{643}}^1$

素因数の和:680

約数の個数: 120

約数和(自身を含む): 225313704

約数和(自身を除く): 144655784

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, 256, 280, 320, 392, 448, 490, 512, 560, 640, 643, 784, 896, 980, 1120, 1280, 1286, 1568, 1792, 1960, 2240, 2560, 2572, 3136, 3215, 3584, 3920, 4480, 4501, 5144, 6272, 6430, 7840, 8960, 9002, 10288, 12544, 12860, 15680, 17920, 18004, 20576, 22505, 25088, 25720, 31360, 31507, 36008, 41152, 45010, 51440, 62720, 63014, 72016, 82304, 90020, 102880, 125440, 126028, 144032, 157535, 164608, 180040, 205760, 252056, 288064, 315070, 329216, 360080, 411520, 504112, 576128, 630140, 720160, 823040, 1008224, 1152256, 1260280, 1440320, 1646080, 2016448, 2304512, 2520560, 2880640, 4032896, 5041120, 5761280, 8065792, 10082240, 11522560, 16131584, 20164480, 40328960, 80657920]

約数ペア:

[(1, 80657920), (2, 40328960), (4, 20164480), (5, 16131584), (7, 11522560), (8, 10082240), (10, 8065792), (14, 5761280), (16, 5041120), (20, 4032896), (28, 2880640), (32, 2520560), (35, 2304512), (40, 2016448), (49, 1646080), (56, 1440320), (64, 1260280), (70, 1152256), (80, 1008224), (98, 823040), (112, 720160), (128, 630140), (140, 576128), (160, 504112), (196, 411520), (224, 360080), (245, 329216), (256, 315070), (280, 288064), (320, 252056), (392, 205760), (448, 180040), (490, 164608), (512, 157535), (560, 144032), (640, 126028), (643, 125440), (784, 102880), (896, 90020), (980, 82304), (1120, 72016), (1280, 63014), (1286, 62720), (1568, 51440), (1792, 45010), (1960, 41152), (2240, 36008), (2560, 31507), (2572, 31360), (3136, 25720), (3215, 25088), (3584, 22505), (3920, 20576), (4480, 18004), (4501, 17920), (5144, 15680), (6272, 12860), (6430, 12544), (7840, 10288), (8960, 9002)]