399936208

素因数分解:

$2^4\times 7^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{907}}^1$

素因数の和:1080

約数の個数: 80

約数和(自身を含む): 922353664

約数和(自身を除く): 522417456

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 31, 56, 62, 112, 124, 127, 217, 248, 254, 434, 496, 508, 868, 889, 907, 1016, 1736, 1778, 1814, 2032, 3472, 3556, 3628, 3937, 6349, 7112, 7256, 7874, 12698, 14224, 14512, 15748, 25396, 27559, 28117, 31496, 50792, 55118, 56234, 62992, 101584, 110236, 112468, 115189, 196819, 220472, 224936, 230378, 393638, 440944, 449872, 460756, 787276, 806323, 921512, 1574552, 1612646, 1843024, 3149104, 3225292, 3570859, 6450584, 7141718, 12901168, 14283436, 24996013, 28566872, 49992026, 57133744, 99984052, 199968104, 399936208]

約数ペア:

[(1, 399936208), (2, 199968104), (4, 99984052), (7, 57133744), (8, 49992026), (14, 28566872), (16, 24996013), (28, 14283436), (31, 12901168), (56, 7141718), (62, 6450584), (112, 3570859), (124, 3225292), (127, 3149104), (217, 1843024), (248, 1612646), (254, 1574552), (434, 921512), (496, 806323), (508, 787276), (868, 460756), (889, 449872), (907, 440944), (1016, 393638), (1736, 230378), (1778, 224936), (1814, 220472), (2032, 196819), (3472, 115189), (3556, 112468), (3628, 110236), (3937, 101584), (6349, 62992), (7112, 56234), (7256, 55118), (7874, 50792), (12698, 31496), (14224, 28117), (14512, 27559), (15748, 25396)]