78880000

素因数分解:

$2^8\times 5^4\times {\mathrm{17}}^1\times {\mathrm{29}}^1$

素因数の和:82

約数の個数: 180

約数和(自身を含む): 215509140

約数和(自身を除く): 136629140

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 25, 29, 32, 34, 40, 50, 58, 64, 68, 80, 85, 100, 116, 125, 128, 136, 145, 160, 170, 200, 232, 250, 256, 272, 290, 320, 340, 400, 425, 464, 493, 500, 544, 580, 625, 640, 680, 725, 800, 850, 928, 986, 1000, 1088, 1160, 1250, 1280, 1360, 1450, 1600, 1700, 1856, 1972, 2000, 2125, 2176, 2320, 2465, 2500, 2720, 2900, 3200, 3400, 3625, 3712, 3944, 4000, 4250, 4352, 4640, 4930, 5000, 5440, 5800, 6400, 6800, 7250, 7424, 7888, 8000, 8500, 9280, 9860, 10000, 10625, 10880, 11600, 12325, 13600, 14500, 15776, 16000, 17000, 18125, 18560, 19720, 20000, 21250, 21760, 23200, 24650, 27200, 29000, 31552, 32000, 34000, 36250, 37120, 39440, 40000, 42500, 46400, 49300, 54400, 58000, 61625, 63104, 68000, 72500, 78880, 80000, 85000, 92800, 98600, 108800, 116000, 123250, 126208, 136000, 145000, 157760, 160000, 170000, 185600, 197200, 232000, 246500, 272000, 290000, 308125, 315520, 340000, 394400, 464000, 493000, 544000, 580000, 616250, 631040, 680000, 788800, 928000, 986000, 1160000, 1232500, 1360000, 1577600, 1972000, 2320000, 2465000, 2720000, 3155200, 3944000, 4640000, 4930000, 7888000, 9860000, 15776000, 19720000, 39440000, 78880000]

約数ペア:

[(1, 78880000), (2, 39440000), (4, 19720000), (5, 15776000), (8, 9860000), (10, 7888000), (16, 4930000), (17, 4640000), (20, 3944000), (25, 3155200), (29, 2720000), (32, 2465000), (34, 2320000), (40, 1972000), (50, 1577600), (58, 1360000), (64, 1232500), (68, 1160000), (80, 986000), (85, 928000), (100, 788800), (116, 680000), (125, 631040), (128, 616250), (136, 580000), (145, 544000), (160, 493000), (170, 464000), (200, 394400), (232, 340000), (250, 315520), (256, 308125), (272, 290000), (290, 272000), (320, 246500), (340, 232000), (400, 197200), (425, 185600), (464, 170000), (493, 160000), (500, 157760), (544, 145000), (580, 136000), (625, 126208), (640, 123250), (680, 116000), (725, 108800), (800, 98600), (850, 92800), (928, 85000), (986, 80000), (1000, 78880), (1088, 72500), (1160, 68000), (1250, 63104), (1280, 61625), (1360, 58000), (1450, 54400), (1600, 49300), (1700, 46400), (1856, 42500), (1972, 40000), (2000, 39440), (2125, 37120), (2176, 36250), (2320, 34000), (2465, 32000), (2500, 31552), (2720, 29000), (2900, 27200), (3200, 24650), (3400, 23200), (3625, 21760), (3712, 21250), (3944, 20000), (4000, 19720), (4250, 18560), (4352, 18125), (4640, 17000), (4930, 16000), (5000, 15776), (5440, 14500), (5800, 13600), (6400, 12325), (6800, 11600), (7250, 10880), (7424, 10625), (7888, 10000), (8000, 9860), (8500, 9280)]