81216680

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{2053}}^1$

素因数の和:2130

約数の個数: 64

約数和(自身を含む): 195212160

約数和(自身を除く): 113995480

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 43, 46, 86, 92, 115, 172, 184, 215, 230, 344, 430, 460, 860, 920, 989, 1720, 1978, 2053, 3956, 4106, 4945, 7912, 8212, 9890, 10265, 16424, 19780, 20530, 39560, 41060, 47219, 82120, 88279, 94438, 176558, 188876, 236095, 353116, 377752, 441395, 472190, 706232, 882790, 944380, 1765580, 1888760, 2030417, 3531160, 4060834, 8121668, 10152085, 16243336, 20304170, 40608340, 81216680]

約数ペア:

[(1, 81216680), (2, 40608340), (4, 20304170), (5, 16243336), (8, 10152085), (10, 8121668), (20, 4060834), (23, 3531160), (40, 2030417), (43, 1888760), (46, 1765580), (86, 944380), (92, 882790), (115, 706232), (172, 472190), (184, 441395), (215, 377752), (230, 353116), (344, 236095), (430, 188876), (460, 176558), (860, 94438), (920, 88279), (989, 82120), (1720, 47219), (1978, 41060), (2053, 39560), (3956, 20530), (4106, 19780), (4945, 16424), (7912, 10265), (8212, 9890)]