81619280

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{32911}}^1$

素因数の和:32955

約数の個数: 40

約数和(自身を含む): 195892224

約数和(自身を除く): 114272944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 32911, 65822, 131644, 164555, 263288, 329110, 526576, 658220, 1020241, 1316440, 2040482, 2632880, 4080964, 5101205, 8161928, 10202410, 16323856, 20404820, 40809640, 81619280]

約数ペア:

[(1, 81619280), (2, 40809640), (4, 20404820), (5, 16323856), (8, 10202410), (10, 8161928), (16, 5101205), (20, 4080964), (31, 2632880), (40, 2040482), (62, 1316440), (80, 1020241), (124, 658220), (155, 526576), (248, 329110), (310, 263288), (496, 164555), (620, 131644), (1240, 65822), (2480, 32911)]