21038095

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{241}}^1$

素因数の和:355

約数の個数: 32

約数和(自身を含む): 29272320

約数和(自身を除く): 8234225

約数列:

[1, 5, 13, 17, 65, 79, 85, 221, 241, 395, 1027, 1105, 1205, 1343, 3133, 4097, 5135, 6715, 15665, 17459, 19039, 20485, 53261, 87295, 95195, 247507, 266305, 323663, 1237535, 1618315, 4207619, 21038095]

約数ペア:

[(1, 21038095), (5, 4207619), (13, 1618315), (17, 1237535), (65, 323663), (79, 266305), (85, 247507), (221, 95195), (241, 87295), (395, 53261), (1027, 20485), (1105, 19039), (1205, 17459), (1343, 15665), (3133, 6715), (4097, 5135)]