19708535

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 30730752

約数和(自身を除く): 11022217

約数列:

[1, 5, 7, 11, 35, 49, 55, 71, 77, 103, 245, 355, 385, 497, 515, 539, 721, 781, 1133, 2485, 2695, 3479, 3605, 3905, 5047, 5467, 5665, 7313, 7931, 17395, 25235, 27335, 36565, 38269, 39655, 51191, 55517, 80443, 191345, 255955, 277585, 358337, 402215, 563101, 1791685, 2815505, 3941707, 19708535]

約数ペア:

[(1, 19708535), (5, 3941707), (7, 2815505), (11, 1791685), (35, 563101), (49, 402215), (55, 358337), (71, 277585), (77, 255955), (103, 191345), (245, 80443), (355, 55517), (385, 51191), (497, 39655), (515, 38269), (539, 36565), (721, 27335), (781, 25235), (1133, 17395), (2485, 7931), (2695, 7313), (3479, 5665), (3605, 5467), (3905, 5047)]