21676785

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{503}}^1$

素因数の和:554

約数の個数: 48

約数和(自身を含む): 39844224

約数和(自身を除く): 18167439

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 169, 195, 221, 255, 503, 507, 663, 845, 1105, 1509, 2515, 2535, 2873, 3315, 6539, 7545, 8551, 8619, 14365, 19617, 25653, 32695, 42755, 43095, 85007, 98085, 111163, 128265, 255021, 333489, 425035, 555815, 1275105, 1445119, 1667445, 4335357, 7225595, 21676785]

約数ペア:

[(1, 21676785), (3, 7225595), (5, 4335357), (13, 1667445), (15, 1445119), (17, 1275105), (39, 555815), (51, 425035), (65, 333489), (85, 255021), (169, 128265), (195, 111163), (221, 98085), (255, 85007), (503, 43095), (507, 42755), (663, 32695), (845, 25653), (1105, 19617), (1509, 14365), (2515, 8619), (2535, 8551), (2873, 7545), (3315, 6539)]