20948655

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{149}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 41932800

約数和(自身を除く): 20984145

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 103, 105, 149, 195, 273, 309, 447, 455, 515, 721, 745, 1043, 1339, 1365, 1545, 1937, 2163, 2235, 3129, 3605, 4017, 5215, 5811, 6695, 9373, 9685, 10815, 13559, 15347, 15645, 20085, 28119, 29055, 40677, 46041, 46865, 67795, 76735, 107429, 140595, 199511, 203385, 230205, 322287, 537145, 598533, 997555, 1396577, 1611435, 2992665, 4189731, 6982885, 20948655]

約数ペア:

[(1, 20948655), (3, 6982885), (5, 4189731), (7, 2992665), (13, 1611435), (15, 1396577), (21, 997555), (35, 598533), (39, 537145), (65, 322287), (91, 230205), (103, 203385), (105, 199511), (149, 140595), (195, 107429), (273, 76735), (309, 67795), (447, 46865), (455, 46041), (515, 40677), (721, 29055), (745, 28119), (1043, 20085), (1339, 15645), (1365, 15347), (1545, 13559), (1937, 10815), (2163, 9685), (2235, 9373), (3129, 6695), (3605, 5811), (4017, 5215)]