21986185

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{197}}^1$

素因数の和:333

約数の個数: 32

約数和(自身を含む): 30536352

約数和(自身を除く): 8550167

約数列:

[1, 5, 13, 17, 65, 85, 101, 197, 221, 505, 985, 1105, 1313, 1717, 2561, 3349, 6565, 8585, 12805, 16745, 19897, 22321, 43537, 99485, 111605, 217685, 258661, 338249, 1293305, 1691245, 4397237, 21986185]

約数ペア:

[(1, 21986185), (5, 4397237), (13, 1691245), (17, 1293305), (65, 338249), (85, 258661), (101, 217685), (197, 111605), (221, 99485), (505, 43537), (985, 22321), (1105, 19897), (1313, 16745), (1717, 12805), (2561, 8585), (3349, 6565)]