80408920

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{1231}}^1$

素因数の和:1336

約数の個数: 64

約数和(自身を含む): 191600640

約数和(自身を除く): 111191720

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 71, 92, 115, 142, 184, 230, 284, 355, 460, 568, 710, 920, 1231, 1420, 1633, 2462, 2840, 3266, 4924, 6155, 6532, 8165, 9848, 12310, 13064, 16330, 24620, 28313, 32660, 49240, 56626, 65320, 87401, 113252, 141565, 174802, 226504, 283130, 349604, 437005, 566260, 699208, 874010, 1132520, 1748020, 2010223, 3496040, 4020446, 8040892, 10051115, 16081784, 20102230, 40204460, 80408920]

約数ペア:

[(1, 80408920), (2, 40204460), (4, 20102230), (5, 16081784), (8, 10051115), (10, 8040892), (20, 4020446), (23, 3496040), (40, 2010223), (46, 1748020), (71, 1132520), (92, 874010), (115, 699208), (142, 566260), (184, 437005), (230, 349604), (284, 283130), (355, 226504), (460, 174802), (568, 141565), (710, 113252), (920, 87401), (1231, 65320), (1420, 56626), (1633, 49240), (2462, 32660), (2840, 28313), (3266, 24620), (4924, 16330), (6155, 13064), (6532, 12310), (8165, 9848)]