81628520

素因数分解:

$2^3\times 5^1\times {\mathrm{283}}^1\times {\mathrm{7211}}^1$

素因数の和:7505

約数の個数: 32

約数和(自身を含む): 184338720

約数和(自身を除く): 102710200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 283, 566, 1132, 1415, 2264, 2830, 5660, 7211, 11320, 14422, 28844, 36055, 57688, 72110, 144220, 288440, 2040713, 4081426, 8162852, 10203565, 16325704, 20407130, 40814260, 81628520]

約数ペア:

[(1, 81628520), (2, 40814260), (4, 20407130), (5, 16325704), (8, 10203565), (10, 8162852), (20, 4081426), (40, 2040713), (283, 288440), (566, 144220), (1132, 72110), (1415, 57688), (2264, 36055), (2830, 28844), (5660, 14422), (7211, 11320)]