18786915

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:153

約数の個数: 96

約数和(自身を含む): 40634880

約数和(自身を除く): 21847965

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 35, 43, 45, 57, 63, 73, 95, 105, 129, 133, 171, 215, 219, 285, 301, 315, 365, 387, 399, 511, 645, 657, 665, 817, 855, 903, 1095, 1197, 1387, 1505, 1533, 1935, 1995, 2451, 2555, 2709, 3139, 3285, 4085, 4161, 4515, 4599, 5719, 5985, 6935, 7353, 7665, 9417, 9709, 12255, 12483, 13545, 15695, 17157, 20805, 21973, 22995, 28251, 28595, 29127, 36765, 47085, 48545, 51471, 59641, 62415, 65919, 85785, 87381, 109865, 141255, 145635, 178923, 197757, 257355, 298205, 329595, 417487, 436905, 536769, 894615, 988785, 1252461, 2087435, 2683845, 3757383, 6262305, 18786915]

約数ペア:

[(1, 18786915), (3, 6262305), (5, 3757383), (7, 2683845), (9, 2087435), (15, 1252461), (19, 988785), (21, 894615), (35, 536769), (43, 436905), (45, 417487), (57, 329595), (63, 298205), (73, 257355), (95, 197757), (105, 178923), (129, 145635), (133, 141255), (171, 109865), (215, 87381), (219, 85785), (285, 65919), (301, 62415), (315, 59641), (365, 51471), (387, 48545), (399, 47085), (511, 36765), (645, 29127), (657, 28595), (665, 28251), (817, 22995), (855, 21973), (903, 20805), (1095, 17157), (1197, 15695), (1387, 13545), (1505, 12483), (1533, 12255), (1935, 9709), (1995, 9417), (2451, 7665), (2555, 7353), (2709, 6935), (3139, 5985), (3285, 5719), (4085, 4599), (4161, 4515)]