81372520

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{479}}^1$

素因数の和:658

約数の個数: 64

約数和(自身を含む): 190771200

約数和(自身を除く): 109398680

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 137, 155, 248, 274, 310, 479, 548, 620, 685, 958, 1096, 1240, 1370, 1916, 2395, 2740, 3832, 4247, 4790, 5480, 8494, 9580, 14849, 16988, 19160, 21235, 29698, 33976, 42470, 59396, 65623, 74245, 84940, 118792, 131246, 148490, 169880, 262492, 296980, 328115, 524984, 593960, 656230, 1312460, 2034313, 2624920, 4068626, 8137252, 10171565, 16274504, 20343130, 40686260, 81372520]

約数ペア:

[(1, 81372520), (2, 40686260), (4, 20343130), (5, 16274504), (8, 10171565), (10, 8137252), (20, 4068626), (31, 2624920), (40, 2034313), (62, 1312460), (124, 656230), (137, 593960), (155, 524984), (248, 328115), (274, 296980), (310, 262492), (479, 169880), (548, 148490), (620, 131246), (685, 118792), (958, 84940), (1096, 74245), (1240, 65623), (1370, 59396), (1916, 42470), (2395, 33976), (2740, 29698), (3832, 21235), (4247, 19160), (4790, 16988), (5480, 14849), (8494, 9580)]