81407248

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{20599}}^1$

素因数の和:20639

約数の個数: 40

約数和(自身を含む): 178808000

約数和(自身を除く): 97400752

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 494, 988, 1976, 3952, 20599, 41198, 82396, 164792, 267787, 329584, 391381, 535574, 782762, 1071148, 1565524, 2142296, 3131048, 4284592, 5087953, 6262096, 10175906, 20351812, 40703624, 81407248]

約数ペア:

[(1, 81407248), (2, 40703624), (4, 20351812), (8, 10175906), (13, 6262096), (16, 5087953), (19, 4284592), (26, 3131048), (38, 2142296), (52, 1565524), (76, 1071148), (104, 782762), (152, 535574), (208, 391381), (247, 329584), (304, 267787), (494, 164792), (988, 82396), (1976, 41198), (3952, 20599)]