28353520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{199}}^1$

素因数の和:362

約数の個数: 80

約数和(自身を含む): 71870400

約数和(自身を除く): 43516880

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 137, 199, 208, 260, 274, 398, 520, 548, 685, 796, 995, 1040, 1096, 1370, 1592, 1781, 1990, 2192, 2587, 2740, 3184, 3562, 3980, 5174, 5480, 7124, 7960, 8905, 10348, 10960, 12935, 14248, 15920, 17810, 20696, 25870, 27263, 28496, 35620, 41392, 51740, 54526, 71240, 103480, 109052, 136315, 142480, 206960, 218104, 272630, 354419, 436208, 545260, 708838, 1090520, 1417676, 1772095, 2181040, 2835352, 3544190, 5670704, 7088380, 14176760, 28353520]

約数ペア:

[(1, 28353520), (2, 14176760), (4, 7088380), (5, 5670704), (8, 3544190), (10, 2835352), (13, 2181040), (16, 1772095), (20, 1417676), (26, 1090520), (40, 708838), (52, 545260), (65, 436208), (80, 354419), (104, 272630), (130, 218104), (137, 206960), (199, 142480), (208, 136315), (260, 109052), (274, 103480), (398, 71240), (520, 54526), (548, 51740), (685, 41392), (796, 35620), (995, 28496), (1040, 27263), (1096, 25870), (1370, 20696), (1592, 17810), (1781, 15920), (1990, 14248), (2192, 12935), (2587, 10960), (2740, 10348), (3184, 8905), (3562, 7960), (3980, 7124), (5174, 5480)]