19918665

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{431}}^1$

素因数の和:534

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 17820855

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 79, 117, 195, 237, 395, 431, 585, 711, 1027, 1185, 1293, 2155, 3081, 3555, 3879, 5135, 5603, 6465, 9243, 15405, 16809, 19395, 28015, 34049, 46215, 50427, 84045, 102147, 170245, 252135, 306441, 442637, 510735, 1327911, 1532205, 2213185, 3983733, 6639555, 19918665]

約数ペア:

[(1, 19918665), (3, 6639555), (5, 3983733), (9, 2213185), (13, 1532205), (15, 1327911), (39, 510735), (45, 442637), (65, 306441), (79, 252135), (117, 170245), (195, 102147), (237, 84045), (395, 50427), (431, 46215), (585, 34049), (711, 28015), (1027, 19395), (1185, 16809), (1293, 15405), (2155, 9243), (3081, 6465), (3555, 5603), (3879, 5135)]