21275488

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{257}}^1$

素因数の和:479

約数の個数: 48

約数和(自身を含む): 45511200

約数和(自身を除く): 24235712

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 199, 208, 257, 398, 416, 514, 796, 1028, 1592, 2056, 2587, 3184, 3341, 4112, 5174, 6368, 6682, 8224, 10348, 13364, 20696, 26728, 41392, 51143, 53456, 82784, 102286, 106912, 204572, 409144, 664859, 818288, 1329718, 1636576, 2659436, 5318872, 10637744, 21275488]

約数ペア:

[(1, 21275488), (2, 10637744), (4, 5318872), (8, 2659436), (13, 1636576), (16, 1329718), (26, 818288), (32, 664859), (52, 409144), (104, 204572), (199, 106912), (208, 102286), (257, 82784), (398, 53456), (416, 51143), (514, 41392), (796, 26728), (1028, 20696), (1592, 13364), (2056, 10348), (2587, 8224), (3184, 6682), (3341, 6368), (4112, 5174)]